Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0f9b1f3d8c0b8b…

MALICIOUS

PDF

67.7 KB Created: 2021-02-12 11:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6ca3980d2115621c2fe5424dbcde3c6d SHA-1: db8c9df9310fe1b824af623e4f5a1b45a83e8224 SHA-256: 6d0f9b1f3d8c0b8bfc5fc9fec2105c1ab8d1d50cba7999c7c11cea7826346fea
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://jacksth.ru/wix?keyword=weakness+of+manager PDF link annotation
    • https://dananiruw.weebly.com/uploads/1/3/2/7/132741593/1361628.pdfIn PDF document text
    • https://vavavutexe.weebly.com/uploads/1/3/4/4/134441002/9009724.pdfIn PDF document text
    • http://poxinezov.iblogger.org/canon_g7x_mark_ii_manual_focus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_6007440d6f4d9.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/jb1BQjg/balumigudogugew.pdfIn PDF document text
    • https://kaxesudinebeg.weebly.com/uploads/1/3/1/3/131379803/4383773.pdfIn PDF document text
    • https://bufujibuku.weebly.com/uploads/1/3/4/8/134862056/8721280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_6020bb1f9fe01.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/jUElyii/23819283034.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/mavenirukitewi_zononewiti.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/fizufapu/tefis.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/boarding_pass_invitation_free_template.pdfIn PDF document text
    • http://vezavajizuvos.epizy.com/28095930133.pdfIn PDF document text
    • http://pokazirajig.rf.gd/jeteb.pdfIn PDF document text
    • http://ruxofepugoloma.rf.gd/xasupivefibizija.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/broadcast_receiver_android_developer.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/2017_camaro_ss_performance_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/html_select_form_control.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_off0000ccc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC6 5132 bytes
SHA-256: 12e1e11d798825df2099a44f3a41c4bfb3380ab6b27d097f31b8a70c0f647641
font_01_sfnt_off0000de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 9960 bytes
SHA-256: 86d5760e9b79eef60aaf0fcf72f9c71f8d625078f83fd0572ed07e40eac69b62

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