Malicious PDF — malware analysis report

Static analysis result for SHA-256 2619d81badaf9556…

MALICIOUS

PDF

67.9 KB Created: 2021-01-23 18:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 045474c4534d5ed76f7abed42266be83 SHA-1: 880576d5ad9605158b89b94dbff735362890dbb3 SHA-256: 2619d81badaf95565bb75a0367b1de916970bcbc1a98bc2c4987b979cd6e96d7
186 Risk Score

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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://jottigo.ru/wb?keyword=industrial%20electrical%20symbols%20and%20meanings PDF link annotation
    • http://werewov.22web.org/95452771786.pdfIn PDF document text
    • https://site-1171718.mozfiles.com/files/1171718/poly_mood_3d_puzzle.pdfIn PDF document text
    • https://site-1084153.mozfiles.com/files/1084153/47340199598.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/hiWxlKB/limbo_video_game_nintendo_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/idpjjib/borijelugul.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/ihAnjgq/cafe_racer_off_road.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/9030256.pdfIn PDF document text
    • https://cdn.sqhk.co/tigadikem/zJt3jbV/whispering_woods_toads.pdfIn PDF document text
    • https://site-1168092.mozfiles.com/files/1168092/buduferakowo.pdfIn PDF document text
    • https://site-1177680.mozfiles.com/files/1177680/xajibuzoxatige.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/audew_jump_starter_manual.pdfIn PDF document text
    • http://vubixegigag.rf.gd/pakodebefo.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/jeromomoje.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/gewupudomadanadi.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/31798810031.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_off0000cb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB21 5440 bytes
SHA-256: 9c7688660c6d5af02cd858337f22f1dc92c150c0146b70238b990a26fea6eff3
font_01_sfnt_off0000dd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8D 11264 bytes
SHA-256: e81f0002624e466cff0b84caea94038d30880a2375e88acb71653326680d16bc