Malicious PDF — malware analysis report

Static analysis result for SHA-256 3522a2b6a3272ea6…

MALICIOUS

PDF

81.3 KB Created: 2021-05-28 10:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd2b395153079997b896dcf940919751 SHA-1: 2f1706daef3395c85edec7c2ed97d52eb02173a1 SHA-256: 3522a2b6a3272ea6e9adc490ac6e28027f7779ef354838a7f4bbc7648c8910ab
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://ponafet.ru/strik?utm_term=york+diamond+80+furnace+owners+manual', is presented as a furnace manual but likely serves as a lure for phishing or malware delivery. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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
  • 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://ponafet.ru/strik?utm_term=york+diamond+80+furnace+owners+manual
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/tagovezab.pdf
    • https://roralolew.weebly.com/uploads/1/3/0/7/130775143/zinaluxivesab.pdf
    • https://gomigara.weebly.com/uploads/1/3/4/7/134727279/fovaxog-doxiz-tunizemupinida.pdf
    • https://popewike.weebly.com/uploads/1/3/1/4/131407195/jetukejipiso.pdf
    • https://xolasugoduto.weebly.com/uploads/1/3/4/5/134592704/8d16580fc7.pdf
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/e588ca6fc9385.pdf
    • https://buwofapakudo.weebly.com/uploads/1/3/5/3/135316190/9de67.pdf
    • https://tuwoganerolet.weebly.com/uploads/1/3/4/6/134631505/4716310.pdf
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fd1ca6051cf2.pdf
    • https://static.s123-cdn-static.com/uploads/4500187/normal_5fffb3983662c.pdf
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5fcd7ed42870a.pdf
    • https://mozubuwuvufizo.weebly.com/uploads/1/3/4/6/134600540/lopevusizaxone.pdf
    • https://votixired.weebly.com/uploads/1/3/4/6/134633812/075e4ee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f316450e-d4da-41e2-adf9-dc21f39509c6/viwuripon.pdf
    • https://uploads.strikinglycdn.com/files/aab8c6ec-b2a9-456f-9ab0-b8f354c78580/24131404625.pdf
    • https://uploads.strikinglycdn.com/files/5ac340dc-58b3-4cf2-8641-f579a8289d19/4th_grade_math_book_answers.pdf
    • https://uploads.strikinglycdn.com/files/f6734573-ac48-481a-9f3d-01f481fd9ada/is_jotaro_in_part_7.pdf
    • https://uploads.strikinglycdn.com/files/a2f533fe-3fb8-49c8-9843-75820a0731c0/88340463987.pdf
    • https://uploads.strikinglycdn.com/files/c7fa995e-1765-45bb-a58f-2de42fa7d163/panasonic_viera_50_inch_plasma_tv_manual.pdf
    • https://uploads.strikinglycdn.com/files/415f7557-6c22-4961-a7bd-d2dcd82f76fa/is_there_a_cheat_for_coin_master.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6aa.bin
1a00c83747c3ff033d53ecdbdcbdbece4d6d213227b981297349c30887e6d771
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 5620 bytes
font_01_sfnt_off00010993.bin
7b901581c452d6747c5cf50b3f59df86f115bb05d238cf0783b63e189f222b72
pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 1404 bytes
font_02_sfnt_off00011136.bin
f21c9c2aec8c705c265e71bccf53f7a281b07633afa8d77826e44bf8d7cf170b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11136 10648 bytes