Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20e4bfa6dae5fb3…

MALICIOUS

PDF

66.6 KB Created: 2021-06-03 06:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ce522a0030ed5cc9dced1de84a8958d SHA-1: 89868e06d6be5dd06ae243e6f24d1e41dc629e60 SHA-256: f20e4bfa6dae5fb3277b8f9e8f557a4179e2f25b9218d499bf98bddf117036d8
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical PDF link farm detection and a ClamAV signature. The document contains numerous external links, suggesting it is part of an SEO spam or phishing campaign designed to redirect users to potentially malicious websites. No scripts were extracted, but the presence of many external links indicates a likely intent to drive traffic to attacker-controlled domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9359

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nomylo.ru/pbw?utm_term=carnatic+music+lessons+pdf+in+telugu
    • https://nigerizebamogut.weebly.com/uploads/1/3/4/5/134596745/paxosasogesirevu.pdf
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5fe9f13660764.pdf
    • https://cdn-cms.f-static.net/uploads/4476275/normal_6019f465d83b3.pdf
    • https://sojikopel.weebly.com/uploads/1/3/4/7/134760404/d409370c3.pdf
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/milobarur.pdf
    • https://cdn-cms.f-static.net/uploads/4366407/normal_6029809ee7c2b.pdf
    • https://static.s123-cdn-static.com/uploads/4391319/normal_5feeb2ad99a25.pdf
    • https://zujetopefij.weebly.com/uploads/1/3/4/7/134766602/3760626.pdf
    • https://xuminewas.weebly.com/uploads/1/3/7/5/137500686/tosemipijijes.pdf
    • https://cdn-cms.f-static.net/uploads/4375885/normal_600f4987d74b2.pdf
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/5824176.pdf
    • https://static.s123-cdn-static.com/uploads/4403410/normal_600488bcca3ce.pdf
    • https://zexorekimapuwip.weebly.com/uploads/1/3/4/7/134702453/javumigizom_vobadiwomijomu.pdf
    • https://zejifibesus.weebly.com/uploads/1/3/4/5/134586543/5070033.pdf
    • https://kiwuvewe.weebly.com/uploads/1/3/7/5/137509443/f1de7.pdf
    • https://lagukowimewalis.weebly.com/uploads/1/3/5/3/135335318/5270592.pdf
    • https://cdn-cms.f-static.net/uploads/4456132/normal_60504aca3ede1.pdf
    • https://jimazakogise.weebly.com/uploads/1/3/4/6/134612968/eb4148.pdf
    • https://xorosafunopexa.weebly.com/uploads/1/3/7/5/137516733/ralox_xelerebi_lunedav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/daa610a1-1838-48a6-bced-63fe6721e99a/dakosutaxepexuwovo.pdf
    • https://uploads.strikinglycdn.com/files/29a553c7-6e4b-4d99-b0e4-bcc7b5d00df9/how_to_load_a_bostitch_antimicrobial_heavy_duty_stapler.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d616.bin
dff244cdd40860591f8a92198aeaa6cec0f8d1658ae2511bf9999367b1f73449
pdf-font-stream PDF embedded font (sfnt) at offset 0xD616 5380 bytes
font_01_sfnt_off0000e838.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE838 1800 bytes