Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea4ecaa8a5f0dd7…

MALICIOUS

PDF

69.7 KB Created: 2021-01-24 07:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cbecc85225ad9ba6d61bc903ab15eeac SHA-1: 17720e5bc03aa233419c766f4e03b24bf7a1a884 SHA-256: dea4ecaa8a5f0dd780a5ac4200d7eea01c5265685f5a98422810c2049f00c400
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs, with one specifically identified as a payment redirection lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics suggest the document is designed to redirect users to potentially malicious sites for phishing or fraud.

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
  • 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://maypoin.ru/123?utm_term=how+to+check+boxes+in+word+online PDF link annotation
    • http://najapizarut.22web.org/disgaea_pc_grinding_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/UmivY2O/sims_freeplay_cheats_iphone_unlimited_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408001/normal_60080a21c9e8e.pdfIn PDF document text
    • http://bokifov.iblogger.org/zero_conditional_worksheet.pdfIn PDF document text
    • http://kabonuwumew.66ghz.com/equivalent_fractions_worksheets_6th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/R16ggg0/3d_snakes_and_ladders_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/fhe9QOJ/lejek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481272/normal_6007d826196e7.pdfIn PDF document text
    • http://wofeboz.66ghz.com/ccap_income_guidelines_denver_county.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://retesatitogeli.epizy.com/manejosapuwijutubopige.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/newspaper_article_template_word.pdfIn PDF document text
    • http://gexazavere.epizy.com/fimatodagok.pdfIn PDF document text
    • http://filubukuwewe.epizy.com/1078177364.pdfIn PDF document text
    • http://kirigawegugava.epizy.com/febulidijogaxupibop.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/wedding_invitation_powerpoint_templates.pdfIn PDF document text
    • http://xawezukazekexi.epizy.com/15070763097.pdfIn PDF document text
    • http://notewewagegev.rf.gd/846577770.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/difference_between_census_and_sample_survey.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_off0000d569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD569 5144 bytes
SHA-256: 05bd8ed745c9ca5e298b1bb9cbeda9d8c2f30a8be69cf6c81cde6a1bba986b8c
font_01_sfnt_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 9984 bytes
SHA-256: d7cbf503429c910c51294de167d10b5846deeba7081f361e80253bf8aee8b0d2

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