Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0e34419602930d…

MALICIOUS

PDF

129.9 KB Created: 2021-06-05 08:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ecc66dfb08d4cd747a396e797967d8d0 SHA-1: b7283429682deac3d1244c88625f4af548986395 SHA-256: ca0e34419602930d35f59271b1a7fa95a7d79529f40c578608fe24ec454a0803
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/123?utm_term=annamalai+university+dde+mba+books PDF link annotation
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/dororidipepafulak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_60579ec44f565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_6003b6109ca25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_606b4f95cf392.pdfIn PDF document text
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/zolepizodopov.pdfIn PDF document text
    • https://menedusuwoguv.weebly.com/uploads/1/3/4/6/134699995/fotepitapowaju_muxoligemekox_piteruzebokesu_mebogemad.pdfIn PDF document text
    • https://zukixuvaxetili.weebly.com/uploads/1/3/5/9/135988851/lotizizavabor_tumatawa_sivesaruke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_60638396928a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_6023807c46e5b.pdfIn PDF document text
    • https://masenajeronuzes.weebly.com/uploads/1/3/1/6/131637464/c9bbda2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_6022f554b80f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_60144c4b77b0f.pdfIn PDF document text
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/1615170d9.pdfIn PDF document text
    • https://jemogofeti.weebly.com/uploads/1/3/4/0/134042608/vifobapi_gobawuze.pdfIn PDF document text
    • https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/zufikifilisupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5fd3589aaa4c3.pdfIn PDF document text
    • https://dizavobezovedup.weebly.com/uploads/1/3/5/3/135313146/65ad4e3b66a0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minuwaxiper.pbworks.com/f/75121444423.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/f/wabosudeduger.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/f/premam_full_movie_tamil_dubbed_download_isaimini.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E78 5328 bytes
SHA-256: 9284f874c9eea230232f52e78df51861f20abfc072e0648dd4022890880dd37a
font_01_sfnt_off0001b07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B07E 2272 bytes
SHA-256: ed7a9e95a1afd16e88afeb939e565f028e53243eedf10fce7ffaab5c8c2dbddb
font_02_sfnt_off0001bad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAD4 11184 bytes
SHA-256: 20563b00810f5c314c117ed9a1b40f1adcb26555f574de311209b6ab81245c56
font_03_sfnt_off0001e0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0BA 16664 bytes
SHA-256: 2ad542df69f5018ee5b438ce5ab51913d1761e4886a2d3e7d83c74de86a029f9