Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae111621249bf23…

MALICIOUS

PDF

84.1 KB Created: 2021-05-22 21:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f2b5a82137d886e7e33c20f1582b7cf SHA-1: dfd5d181b87da54a05a9e32d0989736dfac0e7bd SHA-256: fae111621249bf23705e71e8f3207ca92d80885ad385e744072b14781ab1d36d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary external links, https://lozipotod.ru/strik?utm_term=free+finder%2527s+fee+agreement+template, is suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier also indicate maliciousness, specifically flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=free+finder%2527s+fee+agreement+template
    • https://static.s123-cdn-static.com/uploads/4420237/normal_5ff04b9dabe43.pdf
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/e37858027a3b7b.pdf
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/vujebinovixe.pdf
    • https://cdn-cms.f-static.net/uploads/4370078/normal_6010e627c692e.pdf
    • https://cdn-cms.f-static.net/uploads/4418166/normal_603f80231a13e.pdf
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fffd646c795d.pdf
    • https://static.s123-cdn-static.com/uploads/4369516/normal_5fffd97da8971.pdf
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fd2d7b1c1eee.pdf
    • https://cdn-cms.f-static.net/uploads/4417815/normal_5fdbfbb6e0aa5.pdf
    • https://static.s123-cdn-static.com/uploads/4413119/normal_5ff266150e77d.pdf
    • https://setabuzi.weebly.com/uploads/1/3/0/7/130775645/kotemexizegego-xukonijilesufi-mikovojuk-xanogurigizejik.pdf
    • https://cdn-cms.f-static.net/uploads/4385009/normal_6060a1ad8fe09.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zesotat/vsco_apk_mod.pdf
    • https://uploads.strikinglycdn.com/files/b4215c12-f667-441c-9fb5-502f5acc1866/41609829701.pdf
    • https://uploads.strikinglycdn.com/files/b9b249c9-bf37-49f2-ba41-78739cbbc480/city_of_glass_movie_mortal_instruments.pdf
    • https://s3.amazonaws.com/moduluzuxikari/english_speaking_practice_conversation.pdf
    • https://uploads.strikinglycdn.com/files/5734a0d4-d98c-44a4-81ba-5ee48b474ce4/zovixiwuware.pdf
    • https://uploads.strikinglycdn.com/files/e5142f00-e47f-4bb9-bce7-e896287b453b/digital_marketing_courses_in_pune_kothrud.pdf
    • https://s3.amazonaws.com/desenaz/67389567206.pdf
    • https://uploads.strikinglycdn.com/files/67fbe3e6-976c-49fe-a9d4-69fe1820e1a1/73910172059.pdf
    • https://uploads.strikinglycdn.com/files/a1a25e45-69ec-458a-8e5e-6087f5e13dde/ruzuxuzepesuzenexixote.pdf
    • https://uploads.strikinglycdn.com/files/fb7590b6-3ca4-4e06-96e7-55be1c301c3f/8164923093.pdf
    • https://uploads.strikinglycdn.com/files/bd3026a7-877d-4fbd-b68e-579dcf699b67/zatemapugopugisal.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_off0000fca1.bin
e12abcef3c65240cb5c010d27e3d5cb763440dc98fd3df8edf623dce75ce05c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 5028 bytes
font_01_sfnt_off00010da5.bin
d39fa3ae80adf5122b0957b564e12ff0e5f8ca6f3072092f9b3b652d3d9e8f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA5 10968 bytes
font_02_sfnt_off00013328.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13328 4324 bytes