Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f6ffd222d63886…

MALICIOUS

PDF

70.1 KB Created: 2021-06-04 20:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b276887573be19e0ccf4a83f0b73561 SHA-1: d8d8e30cf14746341485ace1c6996dcaaaaa1a0e SHA-256: 74f6ffd222d63886b735e977844467d8b4f154136f87b424afe6e2e8398d3507
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on link farm domains, indicating a phishing or spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to software serial numbers, reinforcing the lure for potentially malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://medvor.ru/pbw?utm_term=flip+pdf+professional+2.4+9.29+serial+number
    • https://cdn-cms.f-static.net/uploads/4454971/normal_6011fb9da8f8b.pdf
    • https://xadibepewi.weebly.com/uploads/1/3/4/4/134447443/5548214.pdf
    • https://cdn-cms.f-static.net/uploads/4462046/normal_5fd64506746d2.pdf
    • https://wivezinafixozut.weebly.com/uploads/1/3/0/9/130969190/1437045.pdf
    • https://cdn-cms.f-static.net/uploads/4475376/normal_600a06648ff33.pdf
    • https://jufesuzukexo.weebly.com/uploads/1/3/5/2/135294717/fufixexividonin.pdf
    • https://sudewivevumofe.weebly.com/uploads/1/3/4/0/134042571/fifetalar_bepukorive_xuviwexun.pdf
    • https://kikipaniwuno.weebly.com/uploads/1/3/4/7/134714830/8521384.pdf
    • https://static.s123-cdn-static.com/uploads/4370052/normal_5fcbe7cab2f37.pdf
    • https://sarowamirubene.weebly.com/uploads/1/3/4/7/134736793/ruxuxiwu-nivaza-bobasewusejid-kinirag.pdf
    • https://jafuxudaxifi.weebly.com/uploads/1/3/0/7/130739212/679299.pdf
    • https://pakurematumomu.weebly.com/uploads/1/3/4/7/134764434/7fe7a2de324428c.pdf
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/temizuzoxomow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/78c385e4-b2a7-4003-bf7b-a45f02286e45/how_to_do_a_financial_balance_sheet.pdf
    • https://uploads.strikinglycdn.com/files/c168dc2d-5c5a-4e56-8741-bdf9c23f04df/kingdom_hearts_birth_by_sleep_light_novel_read_online.pdf
    • https://uploads.strikinglycdn.com/files/c1ab08e9-802c-42e2-a6c1-438e7539f0bc/27196648852.pdf
    • https://uploads.strikinglycdn.com/files/9faee45d-1e36-4639-9883-01df40f95620/advanced_algebra_writing_equations_of_transformations.pdf
    • https://uploads.strikinglycdn.com/files/54c72226-3ea3-405d-b823-71e06efa52a6/cuanto_vale_1_metro_en_centimetros.pdf
    • https://uploads.strikinglycdn.com/files/66b4bcfc-6cc9-41ac-ac2c-45683e01549d/what_do_lavender_roses_signify.pdf
    • https://uploads.strikinglycdn.com/files/312042c8-8203-4032-958d-7f5eb2f588a6/febilojoxugamoditenol.pdf
    • https://uploads.strikinglycdn.com/files/effc39bb-3774-483d-a498-2469a3ae9bfb/best_crossfit_wod_bar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d513.bin
550ea5de8447c7b8c94bc95934104a766daa336825dd6b8f4410abb689e9080e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD513 5688 bytes
font_01_sfnt_off0000e85c.bin
e4ee18f27af3c4e465289695f0e6ae4703d45d6757b234c637a52d6e01021b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE85C 10072 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.