Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d62dca47376d45…

MALICIOUS

PDF

77.3 KB Created: 2021-05-06 00:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0361e25e98ecb0952ad950e25043700a SHA-1: 292da6c977494f7b06b4b253752f4b3d7cbd2083 SHA-256: 16d62dca47376d4569bda32f8d7fe715ed7df7a9cdd20456fccfa4a42b542466
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=the+girl+with+the+dragon+tattoo+2009+order PDF link annotation
    • https://zipemulobob.weebly.com/uploads/1/3/4/5/134528333/womufiremamitejixud.pdfIn PDF document text
    • http://sunny-web.ru/550_paracord_projects_instructionsqbixs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495858/normal_60208ce7d0d22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_5fd7b1cf181f6.pdfIn PDF document text
    • http://hotgirls.host/how_long_to_charge_jlab_wireless_headphonesolgqy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414689/normal_5fe1900317f0c.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/ataxia_approach.pdfIn PDF document text
    • https://botironuz.weebly.com/uploads/1/3/1/3/131380999/jotutafokekiwip.pdfIn PDF document text
    • http://vexezujuzas.scienceontheweb.net/69486209882.pdfIn PDF document text
    • http://pushbiz.fun/dobobalobamitaah7p4.pdfIn PDF document text
    • http://segway-wheelchair.ru/is_death_note_on_netflixrh024.pdfIn PDF document text
    • https://rixatesar.weebly.com/uploads/1/3/1/8/131871899/3157523.pdfIn PDF document text
    • https://pebajubidu.weebly.com/uploads/1/3/1/3/131383648/03e7d.pdfIn PDF document text
    • http://slmit.fun/wunufunikumakixiwatep4ycr.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/99814601599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470836/normal_5fc805b71bc69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5fd9684078852.pdfIn PDF document text
    • http://natlab.ru/8582414323429h3u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22185206-4fc6-4a42-b364-e513b472251f/mallela_teeramlo_sirimalle_puvvu_full_movie_watch_online_free.pdfIn PDF document text
    • http://kofepiropi.onlinewebshop.net/10612546927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76732b07-96ad-422b-a712-0484abb1585a/29283901625.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/34241115887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442bf0ce-2166-49d1-acb7-9fd727719ca9/ikea_malm_king_size_bed_with_drawers.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_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 5380 bytes
SHA-256: 64870007c08ee1852dacd58f8a9b176c127cecfa0965b9b5e4d184ceca1a7cad
font_01_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 10764 bytes
SHA-256: a38bbaf4ecfd80cf9735ba1fc2e2a0cca396beb8827808299f26d3928359a646

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