Malicious PDF — malware analysis report

Static analysis result for SHA-256 9697aafcf8a0c55c…

MALICIOUS

PDF

76.0 KB Created: 2021-06-10 02:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8347ce42217adae6a0828d2fddf04ae1 SHA-1: 3d9fef0ab276209ba5c0078c129df90f7b0b1f15 SHA-256: 9697aafcf8a0c55c0a88e0365c42ac87a5afdc1c69b7bb7171c6b2952f08cb0d
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to historical political weaknesses.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://philabc.ru/pbw?utm_term=what+were+the+weaknesses+of+articles+of+confederation PDF link annotation
    • https://vifabuwu.weebly.com/uploads/1/3/1/6/131606679/mifuvosukeziba.pdfIn PDF document text
    • https://desemezek.weebly.com/uploads/1/3/4/4/134458593/1b76e118c089.pdfIn PDF document text
    • https://nozifudofo.weebly.com/uploads/1/3/2/6/132681081/6534064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446511/normal_60513eb96d11a.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/tukaje.pdfIn PDF document text
    • https://sufafiderek.weebly.com/uploads/1/3/0/8/130814754/bisorewolaki-xobemet-dupesiwazidubem.pdfIn PDF document text
    • https://golisarupu.weebly.com/uploads/1/3/5/3/135317681/76f6a0e9.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/mutaponusufepe_kenezuzavejetat_xulejexogejewi_jofusiximenibo.pdfIn PDF document text
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/kosobuzo-zinofusinako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454048/normal_5fee119a650f4.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/vamugomebilozo.pdfIn PDF document text
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/a15a9cc9efe758c.pdfIn PDF document text
    • https://xulijijexam.weebly.com/uploads/1/3/1/4/131453336/fe041f4a1834e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_6068b5c12852f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500446/normal_60b8a22a20149.pdfIn PDF document text
    • https://gupimarozak.weebly.com/uploads/1/3/4/3/134350981/fosagujape.pdfIn PDF document text
    • https://werovowota.weebly.com/uploads/1/3/4/7/134766705/1097502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482230/normal_5fff73f34468e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feteselulo.pbworks.com/w/file/fetch/144633987/construction_company_profile_template_powerpoint_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c60d264-7563-44b8-82f4-ea287c78606e/gazufas.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144700578/fitulelukosoluz.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/6786664765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8e8adc-923f-4421-ae65-49f4b62a4c05/how_to_use_midi_keyboard_in_fl_studio_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bdf30bc-f22a-44a4-8f1b-fe959b0a3e3d/what_type_of_coolant_for_2014_ford_focus.pdfIn PDF document text
    • http://dobifapig.pbworks.com/f/pozefinikakumena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2361dcb2-dab0-446f-9659-16c9e7f8b22e/kenmore_elite_he3t_washer_instructions.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 5280 bytes
SHA-256: d622b08cf5b7f9b98cbd283c6262ba4bd7ce75fd97cdc1ec695f14c1a1ebbf4b
font_01_sfnt_off0000fcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 11024 bytes
SHA-256: 9c858dbb6680b805b6e9f303b31e29d1c61ff72f81832e8e21710813108d5cdb

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