Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9e9af16da137f5…

MALICIOUS

PDF

87.7 KB Created: 2021-03-18 21:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b4d83acb52f2ac95c81b6d1425c1af2d SHA-1: 12178aca9b1140573b4f77185bf24d07440a5d49 SHA-256: 9d9e9af16da137f5dc56f3cfc793b3f858921ccfa1c020e9bb44fcb3a61368da
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 0.9996

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=are+mercedes+benz+c300+expensive+to+maintain PDF link annotation
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/jizogopisodez-remajesesitekim-borijar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fe2d148bc818.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/46631358267.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/1877326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393362/normal_600005c13ad6e.pdfIn PDF document text
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/43dd425f02.pdfIn PDF document text
    • http://kixesisero.22web.org/nuletewogopisunoxanifo.pdfIn PDF document text
    • https://wazidufadik.weebly.com/uploads/1/3/0/7/130740116/rexatezakupafej.pdfIn PDF document text
    • http://labiluwewinedu.22web.org/bodyweight_strength_training_anatomy_free.pdfIn PDF document text
    • https://konegodifoxud.weebly.com/uploads/1/3/1/3/131380175/b4c8f80.pdfIn PDF document text
    • http://mumixubow.22web.org/felebis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vinixozu.rf.gd/varexokalamipobesovevude.pdfIn PDF document text
    • http://ganubigeponato.rf.gd/2352453148.pdfIn PDF document text
    • http://pekagotikoweguf.epizy.com/bloons_tower_defence_5_free_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15099935-490a-43fe-a7cd-63518a1163bc/potagitabupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8465c6-c16c-4f64-a1fc-733f9b8aa732/the_house_with_a_clock_in_its_walls_book_2.pdfIn PDF document text
    • http://lowuzoduveloga.epizy.com/736988100.pdfIn PDF document text
    • http://jujilopuvij.rf.gd/42347034344.pdfIn PDF document text
    • http://sejofedavija.epizy.com/15396295856.pdfIn PDF document text
    • http://babudenipovux.rf.gd/miradubububobuvixiraw.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/girofox.pdfIn PDF document text
    • http://zurenogodepak.rf.gd/kekujitasorenidu.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_off000116bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BD 5800 bytes
SHA-256: 9c7131ce6884d4d7178dd80d43a8dc744f27909aa03df19b28339a1c1d46c4de
font_01_sfnt_off00012a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6E 11460 bytes
SHA-256: 4dcec2398329d5c7f5866d37fd1721ea141a01833b9d597135ea835a904afe3b

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