Malicious PDF — malware analysis report

Static analysis result for SHA-256 46760d31063bd776…

MALICIOUS

PDF

80.2 KB Created: 2021-02-27 10:31:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b66c3c1b76e151a7e7ad17fdf6f4aa7a SHA-1: 4575731cb1303c1cef9ad0ac973d3397b5f7d6bf SHA-256: 46760d31063bd776b612fb6aa3e400dea2f0323e64e69ce07e4d5550f8c15391
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=olympus+om-2+camera PDF link annotation
    • http://mufutekuson.getenjoyment.net/68899215022.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/pijatagibujod_vanerakepe_zubibibaso.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/cHhiGNw/19396969690.pdfIn PDF document text
    • https://cdn.sqhk.co/tijonodevi/fqjgxhg/wizixowimubaxisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fd3120fb78e8.pdfIn PDF document text
    • http://cabinetsly.xyz/the_periodic_table_songe1dyh.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/gcieNid/shred_downhill_mtb_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475716/normal_601dd3e743ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5fd3689e97bf5.pdfIn PDF document text
    • http://rollernefritmassage.xyz/camera_samsung_wb1100f_manual8u1o7.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/wifipuvutd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_5ff64e5ae2f91.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/ckepOk4/27031559979.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
    • http://netupizorazez.rf.gd/buy_acrylic_sheets_cut_to_size.pdfIn PDF document text
    • http://ritofeli.epizy.com/barcode_generator_ean_13.pdfIn PDF document text
    • http://dudakesiburegig.rf.gd/2154554948.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_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 5020 bytes
SHA-256: 294473bc5a627994667fb637bc7933a758f73898003b93b74b1dbe68d9b8bf95
font_01_sfnt_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 13972 bytes
SHA-256: 19164af59222b6033362b28f6128bda9956f5ae965ec9b575f1b454c49e65a7f
font_02_sfnt_off000125b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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