Malicious PDF — malware analysis report

Static analysis result for SHA-256 13741f4746e403b4…

MALICIOUS

PDF

70.2 KB Created: 2021-02-13 11:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6f673af390e2ad3f5a369b2e76f327d0 SHA-1: 5e1e78985d6170563d12ce18b2e3410b021a4696 SHA-256: 13741f4746e403b41ff61893bd34faa4704d38ec0c66b0a2d583f51ef726d3a8
126 Risk Score

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://baarspo.ru/123?utm_term=the+kill+order+free+online+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459482/normal_601f470511fde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374703/normal_5ffbdb9c97d65.pdfIn PDF document text
    • http://mizusugazalu.22web.org/95199626216.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/kheBfno/78338813431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382974/normal_5fcf4c2b08889.pdfIn PDF document text
    • http://poguferuliwu.iblogger.org/powerpoint_venn_diagram_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373986/normal_5fc71f09a5714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5fd980b65af1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393624/normal_5ff38caf4147f.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/vasofirida/bu_bhopal_time_table.pdfIn PDF document text
    • http://nurupejizijij.rf.gd/custom_maps_minecraft_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/98540011082.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/guideline_hourly_rates_leeds.pdfIn PDF document text
    • http://faxarase.rf.gd/80754960550.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/slide_ppt_islami.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 4760 bytes
SHA-256: b030e0fad9d5bbfca1b3a6eff695fd9a7a11b6af08299e5e6539a005efdccdd3
font_01_sfnt_off0000e8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F0 10264 bytes
SHA-256: 185ee6bacce73ec3712b0fb48a05c56c7cb4c37b80d5be21604a94abc50ca508