Malicious PDF — malware analysis report

Static analysis result for SHA-256 5687abe4fc5a32dd…

MALICIOUS

PDF

91.8 KB Created: 2021-07-18 22:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ea05527d8637127b2734f67f9917bea2 SHA-1: 69577dc33973bbebb29562876959bb7b8041a792 SHA-256: 5687abe4fc5a32dded91f4143a97ef29bb4dcac11dd14a1adce2a34e7445e0cb
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains social engineering lures, including a 'download button' and instructions to execute commands directly via Win+R, indicative of a ClickFix attack. The document also hosts numerous links, many pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ty-universe.com/image/files/20210704_165836.pdf In PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f59ca1274e---niwedab.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/50927757840.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/8157467462.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/bitimituko.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2b2a15a1eabefb6dacefbbfcf7f1d2f0/75648938278.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/3d9593231589094504d5558c45cd6c3c/tagonu.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/r82gn26ft7qf5orm4hdkph4mgd/durisetiforuvu.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd3d266684---kabexakemadejutavub.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/f2390d4d7195612a5ea4cfaf3ff3c2fd/paduzijegoxodoluvipa.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/28311087697.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/purebupanujotimukagerewal.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/104ae00207f6c25b342c5e8bff9ccfa6/20316966551.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/puxuvabepimipizavunodeba.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856da16eeec---fajapuborexorube.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/779132186.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afdac7c32e4---91671325698.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607305b1a9d82---66062478955.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/rasokexudanajuvi.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/44463816837.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49f82b9ba3---15981378356.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/5956e9bea4c147c391161cb475dffcb5/sigifuzediwe.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/8ca5c3f34ced731a0207bbd32ae3e213/ruvof.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16073a36a7a007---mumelovibatepebukevuxi.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0366490d6f---3645870043.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=windows+xp+recovery+without+cdPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 17048 bytes
SHA-256: 6d695b0d1386daf307d04d1148ea4d0e0bd59aa8bb5833f13bd870b8be00167e
font_01_sfnt_off000130ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AC 10864 bytes
SHA-256: 655dfa99f0ad04a29c59095ac25e4af60c303d1e968467e1ab1e313f92439658
font_02_sfnt_off000149cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.