Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db2ca60d3ed7b0e…

MALICIOUS

PDF

80.4 KB Created: 2021-09-03 20:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ffa9f74420628102a882713253f98501 SHA-1: f4557b0ac033cb4ea737a52f772537fab731fe90 SHA-256: 2db2ca60d3ed7b0eeeb62c98bc6cba5b1f50fc2bc113d7e3ba270370c74cc64c
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to compromised or disposable hosting, likely intended to redirect users to malicious sites. No scripts were extracted, and the document body was unreadable, but the presence of numerous links on potentially untrusted domains strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb861ac943---78706225650.pdf In PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/lavivuxexetetogeta.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/29kokudhrpjmnbne8enhmi7fh0/zumixoverevojapizasuzez.pdfIn PDF document text
    • http://belovosushi.ru/files/botikub.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607987e28ea93---46446164352.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/706399691c67a721937ba8c78e9b8563/86164731073.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffbc0578f3b---37792297302.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/6364706e25cf03a5694938ffeb26fc3b/nivoxumadug.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/sukizexawodotedixikokiw.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072780349e5e---89801519343.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/30929365588.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/maditotuxuzunudeg.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/57555386065.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/zatobonadev.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110e276ce34a---18223812192.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/53fkgp8l72br1tp9u9uu1n0io7/67487673480.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ducc8ls9s686suhliqcjf4pa45/xevofudejep.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607287d257970---92994352789.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/ranababorulerivulaxelek.pdfIn PDF document text
    • http://wjcopy.com/upload/files/xejesizotoriweruluj.pdfIn PDF document text
    • https://venus-forever.com/image/files/274529011.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762833021cb---mipulufunufipom.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a64516f234.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/58993805623.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/67550456297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ellimist+chronicles+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_off0000d7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 10704 bytes
SHA-256: 572be89183549fea50f9401cb72da6b3e9f978bcc6ef0c5f674f64655d3edcac
font_02_sfnt_off00010827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 17252 bytes
SHA-256: 15f1f34d998f2580441cf1e74151ca8e09474c166335e3ed37fcdd443faa5369