Malicious PDF — malware analysis report

Static analysis result for SHA-256 d712acd315740f5e…

MALICIOUS

PDF

73.5 KB Created: 2021-01-27 18:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7b10c0040eb5c6f021b00cf3c93bce31 SHA-1: bc1fd371b6f78072f0c43c620f16d8d10f832fc7 SHA-256: d712acd315740f5e20a09767d792cfcc9d305f14c4ea37f7261072f66fa74983
134 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The presence of external URIs and a specific URL pointing to a file named 'world_map_offline_exe.pdf' suggests an attempt to trick users into downloading an executable. No scripts were extracted, but the PDF structure and associated URLs strongly indicate a phishing or malware distribution attempt.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=browse+tree+guide+amazon+uk PDF link annotation
    • https://cdn.sqhk.co/pasivuzuke/xjhjE4o/world_map_offline_exe.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/eogjVib/83073678207.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/gdAOU3C/air_traffic_control_school_middle_georgia.pdfIn PDF document text
    • http://hookup750.website/the_walking_dead_michonne_episode_2_download_android4zs5l.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/F7vTPii/monster_chef_recipes_egg_saute.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/hGgjqz2/tiny_bubbles_floating_in_urine.pdfIn PDF document text
    • http://winwites.space/gexutoxi997v.pdfIn PDF document text
    • http://girlsbeach.space/54159038661s4er6.pdfIn PDF document text
    • https://cdn.sqhk.co/topazawu/uQjaij9/tokoxamut.pdfIn PDF document text
    • http://smeh-mif.space/drawing_tutorial_mangabcw7a.pdfIn PDF document text
    • https://cdn.sqhk.co/sebidurubuze/Ujfghgc/gravitrax_expansion_trax_amazon.pdfIn PDF document text
    • http://jakartapro.xyz/crescuti_digitalxw013.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://dolifusekaxug.epizy.com/counting_money_worksheets_free.pdfIn PDF document text
    • http://gisinazujawapub.epizy.com/widixutotewamuzudikakitox.pdfIn PDF document text
    • http://pewaxoxepizus.rf.gd/3923459586.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_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 5252 bytes
SHA-256: 1db30adb966fe3c3e5631bffa1642ef9c205374ddf6dcdeb08deebce1e4dc15d
font_01_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 11324 bytes
SHA-256: dd40d0bf241acd75cf258274e101c417d7a2ddee8cfd0117c61daa57b77a7764
font_02_sfnt_off00010b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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