Malicious PDF — malware analysis report

Static analysis result for SHA-256 605acb49d35f9bd7…

MALICIOUS

PDF

85.1 KB Created: 2021-04-20 11:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0b32e9fc5cbf6ce4f1f315ec1bac3ad SHA-1: 70fbce3ff03b06645e4368e4141e1f9236c01d48 SHA-256: 605acb49d35f9bd74c0a3d819c7070c4415afd2d8b20fa62b66fa2bb724536e5
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 0.9992

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://nipisod.ru/strik?utm_term=bowflex+max+trainer+m5+weight+loss+results PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450041/normal_601315611c41b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_600ce1f24e1ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_60657a719fe6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_602813dfc372e.pdfIn PDF document text
    • http://appletopshop.ru/rasapaduribixeromusunollhv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_606ea31bbc874.pdfIn PDF document text
    • http://matrixbicycles.com/questions_on_the_us_economy_during_t0oy5m.pdfIn PDF document text
    • http://brumbum3.xyz/english_speaking_sentences_in_daily_life_in_tamilc3po3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5fdc02df0f557.pdfIn PDF document text
    • http://afracheat1.xyz/15002899237r444s.pdfIn PDF document text
    • http://vpntop.info/bassinet_sheets_adairs0mmn0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_604800ecf3aa1.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
    • https://uploads.strikinglycdn.com/files/9a1e5a98-5aa4-42e6-b356-be3c2524aec9/musovuzivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04254d7-07cb-4839-b511-c1a6955b7f2e/xopebomaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d416c0-850d-4fb0-a99a-df3842c2eae3/bezive.pdfIn PDF document text
    • http://verosaveligiwe.rf.gd/luzidar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b0aed2-f206-44ad-8a85-c5a9712fbbd0/how_to_manage_adhd_without_medication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e037a891-edaf-4137-b8c9-0d22777b60a5/wiwibitore.pdfIn PDF document text
    • http://pozidatizoza.rf.gd/formulaire_ajax_php_mysql.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/persona_5_trumpeter_guide.pdfIn PDF document text
    • http://totexamivemasal.epizy.com/6344559445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ce8260-aa81-4567-b1f3-3004e60eee46/american_ways_chapter_2_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6c7fa0-18af-4a95-88ed-dea90b57f812/81905148628.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_off000100dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DD 5396 bytes
SHA-256: 532b595867bfab06578ab5b5ebbb528c0ed5ab47ed932e92f73278b26a4c385e
font_01_sfnt_off00011325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11325 11068 bytes
SHA-256: 89aa0e2b3c131621a893fbc19b26fa916616939759c39195a39922931dad48f8
font_02_sfnt_off000138b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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