Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1497ce8a664f93…

MALICIOUS

PDF

69.9 KB Created: 2021-02-26 15:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 405227ac32fd7be1cd74c3d411be5437 SHA-1: 5e80a69846e64445728373541590221572be760d SHA-256: ee1497ce8a664f933e4c313b82c9939dfe45ca3e5be0b8d1347eb0788ab5ea1b
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 0.9998

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://pelibifir.ru/wix?keyword=pbs+study+guide PDF link annotation
    • http://podarokinsta.online/newilijegorisnols.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/gFhaqgd/nexijumubuwixuxudawu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428045/normal_5fec018419f76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5fd8484f820e7.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/cqh2hie/fast_food_food_places_to_eat_near_me.pdfIn PDF document text
    • https://kedaregedowe.weebly.com/uploads/1/3/5/3/135321867/vobiko-bidexurotuw-jejug.pdfIn PDF document text
    • http://vkysnaya-eda.site/864686088830gb21.pdfIn PDF document text
    • http://stonersfranchise.com/mapamupenavatezejejegetee3gl3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5fe2c0d7e3d18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374839/normal_5fcf4f0519f0c.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/jd6Kv4l/jexabadalajowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5fd1222355520.pdfIn PDF document text
    • https://cdn.sqhk.co/degawatoze/ifbjbgc/italian_american_football_league_2019.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://jilovin.epizy.com/neo4j_cypher_cheat_sheet.pdfIn PDF document text
    • http://puxedasepuk.epizy.com/16147383330.pdfIn PDF document text
    • http://wewonak.rf.gd/brachial_plexus_block_ultrasound_guided.pdfIn PDF document text
    • http://rasinizewubegeg.epizy.com/behind_closed_doors.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_off0000c8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A2 4564 bytes
SHA-256: afa6626bbdf6e9a0f802f74f1b8672396876933ddd7fa12d5e353ef6ae20bc30
font_01_sfnt_off0000d832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD832 10624 bytes
SHA-256: d5ec52bc8bc57710ca9f660463df7e0152738deef52c490ede275d39377fd6a6
font_02_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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