Malicious PDF — malware analysis report

Static analysis result for SHA-256 3701e4d06301dca0…

MALICIOUS

PDF

75.8 KB Created: 2021-04-04 12:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0cf0b6f7620dde5669555608d79cfaa5 SHA-1: c78503d1d7a5493f8e8c99994708615a6979e7f1 SHA-256: 3701e4d06301dca06df1678070b935049da309982d353b0142e1fe1fd43d290a
166 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a high-confidence ML classifier and a specific heuristic flagging it as a payment redirection lure. The presence of multiple disposable domains and link farms suggests an attempt to obscure the final malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing attempt designed to trick users into believing they need to update payment information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://lozipotod.ru/award?keyword=cryptocurrency+for+dummies+pdf+download PDF link annotation
    • http://bluebadgeapproval.com/67615786028i4x77.pdfIn PDF document text
    • https://cdn.sqhk.co/jokutevek/SOTUzek/crossword_puzzles_to_print_out_for_adults.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/lotufuzosogobafenumojo.pdfIn PDF document text
    • https://cdn.sqhk.co/tezejikibus/icgdgiy/apache_kafka_tutorial_for_beginners.pdfIn PDF document text
    • https://wokusozevopiwaj.weebly.com/uploads/1/3/4/3/134381386/fokimopeva.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/26216188016.pdfIn PDF document text
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/1083881.pdfIn PDF document text
    • http://my-favshop.online/57928974294s4up7.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/natarunisurumiriw.pdfIn PDF document text
    • http://repair-planshetov.ru/raruferamurolunavuzawuvws7d.pdfIn PDF document text
    • https://mokazeke.weebly.com/uploads/1/3/1/3/131384082/d5a5ca09ed9b4d.pdfIn PDF document text
    • https://fuvapele.weebly.com/uploads/1/3/0/7/130738919/sefufoboguvu_nadakoxida_jutape.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/16357052369.pdfIn PDF document text
    • http://xivekoto.medianewsonline.com/15357002029.pdfIn PDF document text
    • http://pubguckazan.com/60753783309d9o1b.pdfIn PDF document text
    • http://jovopomutulilo.medianewsonline.com/colostomy_care_procedure.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/atjeifG/10097400360.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/85798711732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fijumusuxolegoj.atwebpages.com/who_were_the_celts.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/art_forms_in_nature_the_prints_of_ernst_haeckel.pdfIn PDF document text
    • http://solarujarinobo.myartsonline.com/fumurer.pdfIn PDF document text
    • http://koradanizepagow.myartsonline.com/deductive_reasoning_questions.pdfIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/mafetebematab.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_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 5400 bytes
SHA-256: 68f72ed7761904589344e170e671f0e55a13d9c7cf9e0069084d915f8ca65c0d
font_01_sfnt_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 10728 bytes
SHA-256: e42b9416b13fe7c8326aba3e31d8f8ef9583ad16a1068eba2306de005852d1dc

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