Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad8fb9f02a68d43…

MALICIOUS

PDF

75.4 KB Created: 2021-02-26 06:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7e2abda7fcf673dfe64c3ea7c667e41f SHA-1: 9e40d4317b55a9f206473b96095f7b9a76450e34 SHA-256: 0ad8fb9f02a68d4340f36b65ea5e607700199f0ad01a6cf2be354a04da17eb33
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs disguised as search results for specific documents, a common lure for phishing or malware distribution. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

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=geankoplis+transport+processes+5th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/gisepavuv/oNhdu7P/ancient_roman_empire_youtube.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/2012_dodge_avenger_sxt_horsepower.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5fda941c73c72.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/martin_heidegger_summary.pdfIn PDF document text
    • http://alkim.xyz/winnie_the_pooh_personality_test9sseh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474192/normal_60210d433ad08.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/ancient_dracolich_5e_stats.pdfIn PDF document text
    • http://monoga.space/texivabexevivulakilejoxj134s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5fed82858c9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_5fd8ce9a6cf98.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/ieXhcoN/best_business_ideas_with_low_investment_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_600deb13e6566.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/walmart_black_friday_online.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/fizaxo/61623229464.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/jajizomudoxokedore.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/figetuge.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/free_hershey_bar_wrapper_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/jogexiduboguvavemopok.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/69036346132.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_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 5460 bytes
SHA-256: c24112e33a71e100d2f6da060479e2116380cf57416eaf38e4fc8ba5a40fd309
font_01_sfnt_off0000fe71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE71 9868 bytes
SHA-256: 8865da2cd3fd2b95000ffb4bf04a6160663d6c754b2c60eb7f9b1aed8c3cdab9

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