Malicious PDF — malware analysis report

Static analysis result for SHA-256 03eb8350a8510876…

MALICIOUS

PDF

73.2 KB Created: 2021-03-24 05:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e991b5a3735d7d9d50930e71d21c6f8c SHA-1: 0dd9f826a605f4a719e4e0a1ea372a96f2e12623 SHA-256: 03eb8350a85108763fcb91fb53613cea59e427029f455742be6004f00c8c7734
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. Several of these links point to unknown or potentially malicious domains, suggesting an attempt to redirect users to phishing or malware sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://xezojetit.ru/strik?utm_term=which+old+spice+shampoo+smells+the+best
    • http://barcaporirternet-interbank-pe.com/venenabejerznwb9.pdf
    • http://goldenframecollision.com/50308785816e2vah.pdf
    • http://clientbluebadge.com/graco_pack_n_play_sheets_bassinet89pt5.pdf
    • http://suberubepuparo.getenjoyment.net/49297803061.pdf
    • https://tevunuxewime.weebly.com/uploads/1/3/1/4/131452804/satixilosazofa-xezatorosobaba.pdf
    • http://shoop-fh.ru/pawizuguwanekenuzilosag8rktk.pdf
    • https://tivumujodul.weebly.com/uploads/1/3/4/6/134608740/e42b46.pdf
    • http://suwufexez.sportsontheweb.net/how_to_operate_a_ge_self_cleaning_oven.pdf
    • http://xevigukek.iblogger.org/ronirikufasuvupuwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/janodojivi/parquet_courts_tenderness.pdf
    • http://fozozip.onlinewebshop.net/37934650411.pdf
    • http://puvipul.epizy.com/42963453541.pdf
    • https://s3.amazonaws.com/juzinaramip/99341125363.pdf
    • https://s3.amazonaws.com/pazovugal/cycling_jersey_template_word.pdf
    • http://jelamadigeg.epizy.com/vepisewuvinij.pdf
    • https://s3.amazonaws.com/vexeliku/xovipozo.pdf
    • http://radiviwix.onlinewebshop.net/yesterday_beatles_piano_sheet.pdf
    • https://s3.amazonaws.com/xixonu/43369521461.pdf
    • https://s3.amazonaws.com/vebogotexaf/elite_dangerous_horizons_combat_guide.pdf
    • https://s3.amazonaws.com/piradi/zejafikuwakuwasaduxos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd6.bin
1974b891340ede934c8c336954da6e76798470a973214332270d4a96bb8ff49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 5368 bytes
font_01_sfnt_off0000f1fb.bin
43ad722495806e1208edeed4bbed4c7609a53794edab6ee30b2329cb240c82f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 11268 bytes

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