Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea067fdadecf1b7…

MALICIOUS

PDF

90.0 KB Created: 2021-07-23 10:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 81d185f97d7670394a89f5934a49ee88 SHA-1: db614ebb15cdd3a081b493836ce027faa751437a SHA-256: 2ea067fdadecf1b7f19e07ee40c1fa191add6d6cef4101a5e5074726d965c1e0
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://woodfur.in/userfiles/file/57694306881.pdf In PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f3c97cfa5---21923895164.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfac12d626a---27736626618.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef27c0562---kasirowakatepar.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/77bd506dc0cce0707a2d177ff3e701e4/poluxovagixigajura.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/disilawaxebepukaduro.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/qqbnu4nr4834daq2m95ctka7vg/jemewozegudajaredanamabod.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/6231512613.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/lawetubixuderunizawaxag.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/a88d650b85e428d2acadb4fd9f3fb60a/96709961188.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f3ibcbn5jfmmkm06qlrvgn0cl1/puvizejokotulanu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/resdpontbind1sf1g2geoesuq7/wabebunikosorun.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/295a2cfaf0895269e9555c9c88ed8011/gupemodabawurametim.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c45afd20e65---zaxasosor.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/rusigavepevodewavurokesu.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/c9g3asue039069r6edeeoi6n4t/28791265435.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/bee4d88ae7110d5b01f50d11a772c032/judafomeveb.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/5hkdjp6nahndte8li0uehio15d/70286747875.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/gilegoratagak.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092820e3d41a---malavozabifinapodak.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22f21c441f---71778613239.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/geguzuginukibuwad.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609467b5e951d---fabud.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/78804796479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=blood+type+o+diet+food+list+chartPDF 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_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 17696 bytes
SHA-256: 4ca7bedea300add0b58974d27f09c9b5e5d5096c9a230e821c06850746712ae8
font_01_sfnt_off000128b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 10780 bytes
SHA-256: 38b1f2e33d0b27cecbc1dc41a4b3dc0d3b416de25491a73a24cf3fe7101d5f9d
font_02_sfnt_off000141bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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