Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee8e8001b144238…

MALICIOUS

PDF

116.1 KB Created: 2021-07-14 07:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3464f82f20bcb61f6225e918ee2944fe SHA-1: 6ec6c1ef4f8103294a5ab9b8a346ec88283d6245 SHA-256: 8ee8e8001b144238b1b3732d0a405febb86abcec61de671352f205d3b346cff5
196 Risk Score

Malware Insights

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

The file is a PDF document that employs an advance-fee scam lure, aiming to trick users into downloading further malicious content. Multiple heuristics indicate the document is a link farm hosted on compromised websites, likely serving as a distribution point for malicious PDFs. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d21be9d7f6---59750786072.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/571a288fe345249aff4dc165cea2efa8/wamewubozup.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/9358a8aa42839708b0f4700cb124d573/37997118887.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/25299v6dee5fm9ik6tluh2cg57/27147416288.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f754442054---84618830835.pdf
    • https://vinadesigndanang.vn/uploads/image/files/35193096708.pdf
    • http://se-ty.ru/uploads/userfiles/file/bojigeg.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafe653872---pojibitewi.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b289415286b---98780561390.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/869ade497fb325f11c68665e2121a19d/93370108740.pdf
    • http://linklandhotels.com/upfile/editor/files/ramezegivovezigota.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d727597b624---zadufotonukawagowapadune.pdf
    • http://dajuicebarus.com/uploads/files/76539421617.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/50327c76baf14008fb4dc4fbfa0cbbf6/10104606278.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc424b3a29---1404835709.pdf
    • https://watertorens.nl/userfiles/file/jobowokorejukenubebubopi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=theodore+roosevelt+warned+william+howard+taft+that+tariff+reform+would
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000165dd.bin
756dea81a673e9be5b4b1987b3e9208eda45f8551a4fa570ee3928a1135a345f
pdf-font-stream PDF embedded font (sfnt) at offset 0x165DD 10832 bytes
font_01_sfnt_off00017eb9.bin
034759f2824e8ea5036ed801441278b80931566e3e3657070eef91879b761289
pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB9 16936 bytes
font_02_sfnt_off0001aab1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAB1 16792 bytes