Malicious PDF — malware analysis report

Static analysis result for SHA-256 15154869491fc8c1…

MALICIOUS

PDF

70.1 KB Created: 2021-01-14 19:30:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1dfb18d17bdc871ec1569b432b975553 SHA-1: 21a6417664a8a92de78e2b804cb6cb8a167526ab SHA-256: 15154869491fc8c1c8ee581b31cbb609feac76f74d1e40c012a773e9d6e439b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=hexagon+picnic+table+plans+with+umbrella+hole PDF link annotation
    • https://site-1175941.mozfiles.com/files/1175941/fire_boy_water_girl_ice_temple_game_online.pdfIn PDF document text
    • https://site-1193425.mozfiles.com/files/1193425/word_cabin_level_40.pdfIn PDF document text
    • https://site-1168300.mozfiles.com/files/1168300/todomusuforegirup.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/54cb8a2574034cb.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/uihihIR/bozimogefizazipobokorek.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/Rogcy3u/34702844270.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/fef7f.pdfIn PDF document text
    • https://dudabiwik.weebly.com/uploads/1/3/4/3/134354119/kiwesagamibuwusupuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/7zL6E7S/36470540674.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vovopafubipu/tujovowozufefokunuta.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/karya_ilmiah_tentang_bahaya_merokok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC662 5488 bytes
SHA-256: c12c76e75cd2692beb81e9f024735ea7950a4873b44f3d90095a94257e47792f
font_01_sfnt_off0000d8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 10732 bytes
SHA-256: 40c46f025e741284d748b822415f6008797687014b90dbd748e3f15bc2c81289
font_02_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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