Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1223f0913f3e6d…

MALICIOUS

PDF

92.4 KB Created: 2021-07-17 17:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7ecef4644b87d55692f22fc55a46889 SHA-1: 9d04c9658498a1bb4d733cef146d2f2b4090d92a SHA-256: ec1223f0913f3e6dd8ef78b88eeb0eb9d83790920039ed7d6fecefeaa143fbfe
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on compromised websites, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/50c67b7bfd9b2104f175651b9603700f/risatufifanowivu.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/48fbca8cd3dc4a8a269b1c990a317fcc/26229074623.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4e947d887d748aa9353de25a60c27368/lepelufilosojuvi.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fa228021266e817780e7ec4637d2e6b4/65635613104.pdf
    • http://ffarchitettura.it/userfiles/files/70258548759.pdf
    • https://promise-land.com/upload/file/91575484738.pdf
    • https://dreamscapes.ca/dream_scapes/userfiles/files/pufilusadi.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b905a122efb---4289932950.pdf
    • http://mamnonlittlesun.com/upload/files/gefapatu.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb80bda1c2---wigalol.pdf
    • http://kup-vino.cz/web/ckfinder/userfiles/files/rujikabunurasoru.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/r3u6baer0rg6sv2to3a4vvq0je/38598898235.pdf
    • http://nwatchonline.org/userfiles/file/74537325383.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/1ii0g7i0h3bpcedoh34jbi07ml/wafujavedewaxenuronimopu.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608702c5ccf4c---xesitotiw.pdf
    • https://pet-fashion.ro/mm/file/15671838434.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/tn7aajvo2c1h7s1jtv6chnvnj0/31188722432.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1909f86b5a2ff238096ed80986c72345/zevifi.pdf
    • https://its-bulgaria.bg/files/file/buwizipusanenanosuvuv.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/d64de7f81101fe49b360fa41b6f57e26/fozuwite.pdf
    • http://mahnomenalumni.com/clients/879209/File/85817825865.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8e10c22e0---fowisuferozodez.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8ed6732d9---mulegemo.pdf
    • http://jarosi.hu/files/file/90392548062.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=speed+and+agility+program+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4E 16792 bytes
font_01_sfnt_off00010665.bin
fa212a2b4d57428cd4ed4885d478a09a71e05d94866f7b631e46a37f06bec5f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10665 10860 bytes
font_02_sfnt_off00011f44.bin
5c13cceb9d36bbc2bc20aea0fe1d16ac5c722eae827defaa6d249ccd2c25c082
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F44 16160 bytes
font_03_sfnt_off000134c8.bin
a60f7645648aa5d7baf4983d5b4aa0bab5e0e5a4ee4c98aa8b4ec95c7fefa573
pdf-font-stream PDF embedded font (sfnt) at offset 0x134C8 17944 bytes