Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da0d89259607ea8…

MALICIOUS

PDF

97.8 KB Created: 2021-04-06 13:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 81cfb37a79f101d2e8028911c7884b36 SHA-1: f3a7d5fbfcbf1297f10e8a637eb5d21a00a99d2a SHA-256: 5da0d89259607ea859c0c3cc019993bd92781d959d28f27f47a8dafd3198f738
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to a link farm, suggesting a phishing or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://soxebez.ru/award?keyword=cancer+de+pulmon+epidermoide+pdf PDF link annotation
    • http://pro-komp-master.website/63410694935z8ah7.pdfIn PDF document text
    • http://xodaxobomefawod.iblogger.org/chemistry_notes_for_class_12_cbse_free_download.pdfIn PDF document text
    • http://zonedelukekide.iblogger.org/98102713354.pdfIn PDF document text
    • http://idealicaitalia.website/185175257820a6cr.pdfIn PDF document text
    • http://7lessons.website/fiddler_on_the_roof5mr72.pdfIn PDF document text
    • http://purigoguwoz.22web.org/addition_worksheets_sums_to_20.pdfIn PDF document text
    • http://esportzmlevent.com/zanogosunekadoh5bh7.pdfIn PDF document text
    • http://qqkaxes.xyz/99956455957lhdkt.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/murudute/kelechi_africana_love_me_audio.pdfIn PDF document text
    • http://xovabegu.epizy.com/83413667335.pdfIn PDF document text
    • https://3df016ad-b40f-424f-9918-b96c60f46212.filesusr.com/ugd/387bfe_5d4bea869e8e405088b010606cfc586e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebenok/22363545579.pdfIn PDF document text
    • http://xerefigirusew.epizy.com/16716745991.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/email_signature_template_builder.pdfIn PDF document text
    • http://bobamexexaru.rf.gd/briggs_and_stratton_platinum_engine_190cc_manual.pdfIn PDF document text
    • http://faligesiba.rf.gd/out_of_africa_karen_blixen.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/labazadawagivinunu.pdfIn PDF document text
    • http://wufutogaj.epizy.com/c_o_kancharapalem_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/debixipetukokomudetitomeb.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_3dfaa272786d4cfba52ca114a936b0aa.pdf?index=trueIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_d88b80efeb484a9a8a77f0c5c80c008f.pdf?index=trueIn PDF document text
    • https://bd5e8a39-7345-4d1c-b933-e8ec171ec4b0.filesusr.com/ugd/2dab9e_d99973bfa7c6456fb1c0befce4ee91ab.pdf?index=trueIn PDF document text
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_9858ceef6c0945f0a445a34ee9036535.pdf?index=trueIn 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_off00013f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F25 5028 bytes
SHA-256: 88bbe5c420fb833466a273d9a07f04a61443a12f427ba2a6555510936827a1e9
font_01_sfnt_off0001502c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1502C 12348 bytes
SHA-256: 184e0c942aff83c3694f34895172066d2a5f21b4c1c915f3c180972c6d0e767d

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