Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3478ffc178b87ad…

MALICIOUS

PDF

250.4 KB Created: 2021-03-03 14:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4151c4ad7c931e8b05a273993f836b95 SHA-1: 1b04d05e2ffb592d8a4b6b78678380050c2bd58b SHA-256: a3478ffc178b87ada5e11f468bce2e098c53b8c69df5afe754a28954960fc304
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, appears to reference legal content, likely a lure to disguise the malicious intent. No scripts were extracted, but the presence of external URIs is a significant indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/123?utm_term=articulo+1+de+la+constitucion+mexicana+para+ni%25C3%25B1os PDF link annotation
    • https://cdn.sqhk.co/vajirasavuz/iaCehav/lawinivevibemu.pdfIn PDF document text
    • https://bawapumur.weebly.com/uploads/1/3/4/4/134466187/rojofidaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/rejelozekazo/heAwTkO/cute_puppies_names_girl.pdfIn PDF document text
    • http://nenegifivujaxu.mypressonline.com/tureweratoforu.pdfIn PDF document text
    • https://nonexivibofopuv.weebly.com/uploads/1/3/4/6/134603010/9202501.pdfIn PDF document text
    • https://cdn.sqhk.co/xaveredero/3hioNhb/lobbying_meaning_in_english.pdfIn PDF document text
    • https://wojawiso.weebly.com/uploads/1/3/0/8/130813991/nobuwifasafimux-segilo-padunup.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/troy_bilt_mustang_xp_50_price.pdfIn PDF document text
    • https://cdn.sqhk.co/bexexoro/Ehzcifo/gamestop_brick_nj_phone_number.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/vomidekid.pdfIn PDF document text
    • https://tafujopebipa.weebly.com/uploads/1/3/0/7/130774972/6600803.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/nevovumowa/rujoxiworirumigugoko.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/lunajoku.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/catholic_prayer_for_someone_with_mental_illness.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_off00039f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39F9E 5540 bytes
SHA-256: cde2306907a0c1ca5e9979428064208cdefc5b9c21c52318767da1a48f356529
font_01_sfnt_off0003b21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B21D 12228 bytes
SHA-256: 508e3fc456f0bfd18b3683b7ca315bd947f4a8460d29fc2cc85dfd4b8eda267c