Malicious PDF — malware analysis report

Static analysis result for SHA-256 c219abaad6a6c637…

MALICIOUS

PDF

76.1 KB Created: 2021-04-27 19:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8996d8b2f6ea751e8d883644962f48d0 SHA-1: 93cb3cea15ff4eb3f786cad25f750b4ce1eb3fa5 SHA-256: c219abaad6a6c63738045b9951ebb405fc4dddf77be9c1bc303847e8335f79a5
126 Risk Score

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://seumenha.ru/strik?utm_term=the+night+frederic+malle+chile PDF link annotation
    • http://bottlechainworld.com/bake_from_scratch_magazineu1hbg.pdfIn PDF document text
    • http://uscreditinquiry.info/vozejt3bek.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/nuzuluj.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/algebra_1_2_third_edition_answers.pdfIn PDF document text
    • http://chempion.coffee/waroxifugiwawaboxopidefabt7596.pdfIn PDF document text
    • http://good-production18.site/liwugobijipewovinosajusaggwwxy.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/gMieDPk/punevimakalopebo.pdfIn PDF document text
    • http://checkmyscore.info/222193014252sort.pdfIn PDF document text
    • http://vonoxafaku.scienceontheweb.net/zixitikekalupipenukaluzod.pdfIn PDF document text
    • http://priz24.site/dukisofiwi2v310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_232e0fd88a3949a0897a5fa23bc6c396.pdf?index=trueIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_b4788cc2dff844ccbd5460f223ba0ba5.pdf?index=trueIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_cb0dd3ebbc3448ee8965a0c130279698.pdf?index=trueIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_8d42e2abc74f47c287682f16ff6cd3f0.pdf?index=trueIn PDF document text
    • http://rupesujutiwu.myartsonline.com/samsung_bd-f5700_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/54721367294.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/pevizepesikor.pdfIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_f5d5d2af51864150ba88d994568de8b7.pdf?index=trueIn 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_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 5204 bytes
SHA-256: ea2f78b41856c20632f6aab464f12d59f046f02978fae22c47619608077dec6e
font_01_sfnt_off0000fc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC06 11968 bytes
SHA-256: 7a8974871a3573844ae2e36c5d6e62d86b827ea22611661f8b3b204df248fd21

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