Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefd7188ede902fc…

MALICIOUS

PDF

65.2 KB Created: 2021-03-04 01:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1e2a984047fd9c20ca37239169c8be12 SHA-1: 6a14d1b0916d45dbae9b1c379a70d004b36f4d6f SHA-256: fefd7188ede902fc0f9917bf600dc56824b1e3c46f18b8293fdcabf7e887e3b7
166 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://baarspo.ru/wix?keyword=holy+cross+lutheran+school+saginaw+mi PDF link annotation
    • http://zomusip.iblogger.org/a_corporation_that_does_not_distribute_all_of_its_profit_to_stockholders_has.pdfIn PDF document text
    • http://naturalm.space/408501601380yuk0.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/rekarugekapoguxifojiwe.pdfIn PDF document text
    • http://bt-management.website/tepopokefafunaberodejieca09.pdfIn PDF document text
    • http://sodaapp.club/backup_android_without_googleljbu0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452850/normal_5ff0056925796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412909/normal_6006a17b2653b.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/61709609053.pdfIn PDF document text
    • http://lnstagram-support.live/pioneer_vsx-43_subwoofer_not_workingbbmyf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_60246a5827383.pdfIn PDF document text
    • http://meetsol.xyz/agar._io_money_hack_apk8e1yd.pdfIn PDF document text
    • http://copriyghtconfirmed.com/line2_second_phone_number_mod_apkgzwvq.pdfIn PDF document text
    • https://www.hcls.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogalibamadom.myartsonline.com/wuwawamavuxabe.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/93330171942.pdfIn PDF document text
    • http://wupaxine.epizy.com/birej.pdfIn PDF document text
    • http://xupikilagi.rf.gd/19609208504.pdfIn PDF document text
    • http://dapolejalufimi.rf.gd/gelagexexopolopimub.pdfIn PDF document text
    • http://tokegavewori.rf.gd/rumilulugalevi.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_off0000c2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D9 5368 bytes
SHA-256: d4edac938f362f701246ea03a0f80d404f6513807b5a80ccad383f0f4048f601
font_01_sfnt_off0000d509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD509 10080 bytes
SHA-256: 5f1e72137b07b34f892ffcac1d4b5e46535e25e840b060632e7d5f50516467b2

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