Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9ec60be267ec90…

MALICIOUS

PDF

86.1 KB Created: 2021-05-02 05:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 56cc02e08f6a3a19140a21d914c9e25c SHA-1: 956d447040679f2ddebe9f1baa339b14d0032a62 SHA-256: 8c9ec60be267ec9075f7c7f2ba17362ae5b0ecdbb003257e02f236e48cf9078b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as book downloads, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://seumenha.ru/strik?utm_term=the+american+political+system+ken+kollman+3rd+edition+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465024/normal_603cc8bcd980b.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/hciZhiv/chute_de_l_empire_amricain.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_6049efbd6e04d.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/Miigg6k/fegalinilodogeremo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_6020c1d3e4482.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414866/normal_5ff3cf634980d.pdfIn PDF document text
    • https://cdn.sqhk.co/lifupowaseli/fMKheQk/psd_website_mockup.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/hdBhe75/47080256691.pdfIn PDF document text
    • https://cdn.sqhk.co/zazerejaxu/bKfhchO/free_lightroom_alternative_raw.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvuvidova/lgezf0O/33939683854.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/ahjjchc/teacher_simulator_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/icjdHzH/kogej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_600167bfa6858.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukajevo/47370629746.pdfIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_688a55f4a5f34721bba9e716a25e684b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/how_to_deal_with_sociopath_neighbor.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/79089923686.pdfIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_b0cc728c1af94bd48b8154377a07fb65.pdf?index=trueIn PDF document text
    • https://ad217471-f301-4d07-b05b-71cdb813ff8b.filesusr.com/ugd/4f915f_a9f28daf16984552aa625213705aff6a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lonozote/7285568718.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/4055814468.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/60761757318.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/autodesk_homestyler_free_for_pc.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_off00010e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2E 5768 bytes
SHA-256: 5878e6df63de1bfa477e73467a5ee9172aac64a0a6ad52bd76bf26cda8d06fd1
font_01_sfnt_off000121bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BC 11412 bytes
SHA-256: a066f2646f47540beee622091cccea01c19edea03f4105ecfc6fbf21eb048bbd

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