Malicious PDF — malware analysis report

Static analysis result for SHA-256 690d374ce250ac4b…

MALICIOUS

PDF

91.5 KB Created: 2021-03-02 15:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 06d5ba9da65ed4b3e837e440765b0246 SHA-1: 2479a1ff40ba716fbe98d4527e873cda2a0ad990 SHA-256: 690d374ce250ac4b4c1351e8cdbe7f06900632c5206540043d37d69f76aed5e2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a phishing or scam campaign. The presence of numerous embedded URLs on disposable hosting further supports a link farm or phishing attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://botokaw.ru/strik?utm_term=are+lock+picking+tools+illegal+in+california PDF link annotation
    • http://ekzo-fruit.ru/21551351727eq2pe.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/0d8cebbfc.pdfIn PDF document text
    • http://espaceabone.com/91595629321bw9h1.pdfIn PDF document text
    • https://bawapumur.weebly.com/uploads/1/3/4/4/134466187/wegonemapanun_gijopimowaguraz_lineneg_josumuv.pdfIn PDF document text
    • http://microdigitalmeter.xyz/street_racing_syndicate_mod_apkny43m.pdfIn PDF document text
    • https://putusura.weebly.com/uploads/1/3/1/6/131606782/442280.pdfIn PDF document text
    • https://gekiwudev.weebly.com/uploads/1/3/4/7/134769606/pinewibijavanex.pdfIn PDF document text
    • http://reduslimitaly.website/how_to_find_my_medical_assistant_certification_numbern61w7.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/wewutazap-dojuzub-zekeda-ronuvon.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/aqihJjh/tik_tok_rap_songs_roblox_id.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/F5wHjig/splashdown_tower_park_vouchers.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/Wji7YaR/ivan_the_terrible_movie_disney_plus.pdfIn PDF document text
    • http://naturalgood.space/the_5th_wave_rick_yancey3258u.pdfIn PDF document text
    • http://wrinklestiltskin.com/saxukilurolopokob5gkt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 6824 bytes
SHA-256: 3b0a0e2781e247029c6e3317e03cc65651e2b6c4414edc346089e846a7f87182
font_01_sfnt_off00012576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12576 5236 bytes
SHA-256: 372eb136d6ef0115bb909ba365b692655446662011b32a5772ec0b86a05771c1
font_02_sfnt_off00013762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13762 12524 bytes
SHA-256: 5e07ad04a2cc9ac1291b977f0c426b6a4a8b0d7342ce0d05bea7485a867e95fd

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