Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f17d0565faebe4…

MALICIOUS

PDF

74.7 KB Created: 2021-02-27 12:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 771591ff4f642ccb8bc6cb0fa88a1292 SHA-1: 64526c44b3a4ab7b4200e418c21585fae76fd1b0 SHA-256: 91f17d0565faebe4b9329f3dfa9b1ceaec76b2d32a6e3dfcedfd2c5408028bab
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/aws?utm_term=outline+of+martin+luther+king+jr+speech PDF link annotation
    • http://tobufasir.iblogger.org/branding_style_guide_cost.pdfIn PDF document text
    • http://potenciy.xyz/nakinoiq35j.pdfIn PDF document text
    • https://cdn.sqhk.co/notokulojow/jhCjbje/miranda_lambert_instagram_hashtag.pdfIn PDF document text
    • https://xafukulirodut.weebly.com/uploads/1/3/1/3/131379356/347a557.pdfIn PDF document text
    • http://xenifizonuk.22web.org/8731695151.pdfIn PDF document text
    • https://cdn.sqhk.co/mafulavet/6uheiaQ/tefefodulida.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/80353094093.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/bijexemigomefem_vunefet_memoretexi_juvolafazesaw.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/Lie6ge7/voxiledobozizemir.pdfIn PDF document text
    • https://cdn.sqhk.co/sefibenip/bCje3d0/momofobakatodalol.pdfIn PDF document text
    • http://gupupokuvugal.22web.org/molecular_biology_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/ghjgV0f/large_cardboard_box_sizes.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/7jbiPjd/royal_splendor_mattress.pdfIn PDF document text
    • http://amaryllis.space/48960572856u0z0h.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/gjtEiel/32871403082.pdfIn PDF document text
    • https://cdn.sqhk.co/wimakebibane/dniehfo/divilini.pdfIn PDF document text
    • http://mebelintera.ru/format_of_job_letter2kffu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niginikixino.epizy.com/plate_tectonics_concept_map_answers.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_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 5596 bytes
SHA-256: f41d5a67840350fda04ef087cd7c1ddb3ae1c625dc2284b39daac158ea412d1c
font_01_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 10240 bytes
SHA-256: eb3d31e3f3c7c2d58e9acf9df8dfaba5606eac8cec221d7adb05c1b7281f5744

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