Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf4a2c187fbb2ea…

MALICIOUS

PDF

82.6 KB Created: 2021-09-05 07:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 095f8090026559140556c8dc1132aee5 SHA-1: fd80cd1c696feff41f1bf9b280580b78af770ed6 SHA-256: baf4a2c187fbb2ea6e1252f702d8012af4fd6665b8ce677ed29a0ab2190c42d0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to domains that are either compromised or disposable, suggesting an attempt to lure users to malicious sites. The presence of a 'download' button lure further supports a malicious intent to trick users into downloading further payloads or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://regimhotelierbucuresti.com/images/userfiles/zetikixazuwumafafumag.pdf In PDF document text
    • http://a1-automotivegroup.com/upload/files/49396865361.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6986caf0be---90757329420.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/22907672838.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1ec36102b---pamenafirexanezemoj.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/81885963233.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/pogukamafevafarisukes.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/satejazilerowugamejo.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/f73738c4a27b9e0c911e9cd1a506bbbd/bikat.pdfIn PDF document text
    • https://steammining.com/userfiles/file/tominokufagiwaxogokaduwu.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/vazorotelimupabizope.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/dizepe.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/ed4ff61602f8a7fd1f3ee9829b577401/68019524368.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/66073429959.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/semiroterosaxunovewud.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/133361855c4437fc0ed4fb799947b218/22652506101.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/51479780542.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16129465639fe7---62113084787.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/97158417768.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/f001773489f1f70a218dd215615f2f79/65538301632.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609013e1d5c43---2774046938.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/45334919235.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/79051679593.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/87373650028.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078234fcfbea---zalufol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=scrabble+board+printable+pdfPDF 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_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 18052 bytes
SHA-256: 823cae73de5be76ad71861693ebd00c0655796b5f6e4d0a460e2752da07c0c95
font_01_sfnt_off00010c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7E 10660 bytes
SHA-256: cd1e205ff408623700b2ffe971ab5b6e02f2b9c028859e2865e11194a7b01673
font_02_sfnt_off000124c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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