Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ba90b501b7c901…

MALICIOUS

PDF

66.2 KB Created: 2021-03-07 17:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e9321b074330852eec45a9e49b6892f7 SHA-1: a62f10618c1842e5ee1bf1d77adaae91f62fa6f0 SHA-256: 03ba90b501b7c901717f31483a50c211bb3561ecf43e31c0207f789e151ede3d
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body's reference to a sheriff's department number is likely a tactic to make the malicious links appear more legitimate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=douglas+county+sheriff+omaha+non+emergency+number PDF link annotation
    • https://cdn.sqhk.co/lojosexotak/hgjvhbb/14022236113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_601a39b2df4d8.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/jhgiXji/abba_greatest_hits_vol._2_album_cover.pdfIn PDF document text
    • http://lordtrans.ru/zaloxedoxudc9di1.pdfIn PDF document text
    • http://fudopajir.iblogger.org/27038725046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471256/normal_5ff06dc0aadb2.pdfIn PDF document text
    • http://decideyouself.fun/rijojapifrhkn.pdfIn PDF document text
    • http://verezitabel.66ghz.com/7232497039.pdfIn PDF document text
    • https://cdn.sqhk.co/palezubifo/hJ7lhiP/crackle_apple_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/he2gick/raziziwezawixuwovofeb.pdfIn PDF document text
    • http://fit-italy.space/hpi_baja_5b_spare_partsc7aw8.pdfIn PDF document text
    • http://constructionhouse.info/verb_tenses_worksheet_grade_2b0wyb.pdfIn PDF document text
    • http://smilex.club/sena_20s_evo_dual_pack_review9difx.pdfIn PDF document text
    • http://sexudigig.iblogger.org/48827930327.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/juvetaso/lasidenodenek.pdfIn PDF document text
    • http://lirepotinemos.rf.gd/94591302324.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/british_sign_language_alphabet_sheet_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/75042746138.pdfIn PDF document text
    • http://vuzudaru.epizy.com/datasheet_7408_mosfet.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/49082490021.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_off0000c60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60C 5536 bytes
SHA-256: 1e96f816423f88b482ec01d9039793976b0be882c90660661b1f87bd68b75495
font_01_sfnt_off0000d8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C2 9988 bytes
SHA-256: 6183772105d3967317a9ec43d2ae4537e6b73e09b5852611d15d560b8f2ed13b

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