Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d4c2f6a7609740…

MALICIOUS

PDF

77.9 KB Created: 2021-06-07 20:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 63b75ac238ee54a7bf9375fb92a68f2b SHA-1: 9e5476388df0d764cf324370c1864d8f0b8af7cc SHA-256: 74d4c2f6a76097402c1976f5db85d1617347f13abb6aa4b0722acce9d852c596
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://synerhu.ru/pbw?utm_term=how+to+make+fake+cash+app+payment PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5ff758e0cf792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_5ff6ced170ea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_60474356e89d9.pdfIn PDF document text
    • https://sawobefuridavo.weebly.com/uploads/1/3/4/8/134895752/3919860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_6025acf939df3.pdfIn PDF document text
    • https://pimusaxasoj.weebly.com/uploads/1/3/1/8/131856122/maguragowezop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_604a8aae7f238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_6021ea496ffc2.pdfIn PDF document text
    • https://votadewigul.weebly.com/uploads/1/3/0/7/130775387/7781764.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sowenux.pbworks.com/w/file/fetch/144770970/juzukexurotubesugivevox.pdfIn PDF document text
    • http://buluwogot.pbworks.com/w/file/fetch/144598485/alien_vs_predator_evolution_mod_apk.pdfIn PDF document text
    • http://pilujibos.pbworks.com/w/file/fetch/144566127/79305785991.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/f/isothermal_and_adiabatic_process.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/w/file/fetch/144671301/sekekosokovoximu.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/gutot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ded244-b631-4aa8-a08f-6b4ead837703/siruzazejesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e4ecf4-4238-4ac0-b5ff-eb5e157f5e67/yard_machine_snowblower_24_inch_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c809e4-1f74-48b0-bac7-11c80b89f49e/free_medical_assistant_study_guide.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/f/distance_and_displacement_worksheet_answers.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/sebeloseputiko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 5084 bytes
SHA-256: 3f0713dccc189f01e5af64c18ede5b08d8afe88c81a01daf9d83df39ea4ff557
font_01_sfnt_off0000f528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 11380 bytes
SHA-256: 85b84fe880b0ee40371c977983a56d7113f9efcb5acbde72d16d92575a9f6492
font_02_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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