Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a83882f2bfd5e5…

MALICIOUS

PDF

68.9 KB Created: 2021-09-03 07:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cef49d35b1ead86b66ea6c1735ec1136 SHA-1: 6c0259f6d1a7af740416a4fe025ea21de9a91385 SHA-256: 77a83882f2bfd5e51db3a68e50161a939ff2b3cd453c412a31847144a0c4c33e
176 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image that likely conceals a clickable element directing users to one of many external URLs hosted on compromised websites or disposable domains. The document body is heavily obfuscated and appears to be non-readable content, further supporting its role as a deceptive container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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 https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/28b0becf6e0b9f092aa3b77008fba4ca/nidofugadebowavojodota.pdf In PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88122933745.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/e30632e4b40afc8399531f0d65dbe873/wafed.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/97854307950.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/81207531785.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/61030961774.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6b145628ae6975b4c0582474c5d0adef/mimimirefufu.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724d56ede9c---17208765963.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/fijirotasixoparimoxadiz.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/lagurawoviza.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d6a9c47de02a6818afce7922d586f97a/rufoxikulewusixajuped.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/56006984431.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759e34e8f1a---32420820573.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/togumisikukogip.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/jajaxerusap.pdfIn PDF document text
    • http://ca1970.com/clients/10044/File/vanamoj.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/61798698196.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/ratisubemal.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/6f940594c0e324c2704410401fdd5ca0/luwetewixinofasifewitize.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080982910e00---22672405107.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/29238151430.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/88658598551.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/soxibojaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=northern+territory+road+map+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_off0000b364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB364 10640 bytes
SHA-256: ad2c05663e336376c5892fb034bd559e371449f480f99d296b993c7e2c97e4fa
font_01_sfnt_off0000cb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8C 14012 bytes
SHA-256: 560af3cc581baeb32b8c7a18039b2b698808a423dd1a7d1be728b6f5c6e05109
font_02_sfnt_off0000ee03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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