Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddc631081d58513…

MALICIOUS

PDF

80.8 KB Created: 2021-04-07 20:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 290be972dafcaaf23a3e820cc2015cad SHA-1: 5c29b762e5cf08f595efecf94e79c1c121e45bec SHA-256: 1ddc631081d58513d7720d2d25f2fd9a045635f73cef79f1db84fe6a38bce77c
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 domains and link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing lure designed to trick users into downloading malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=minecraft+1.0+apk+paid PDF link annotation
    • http://fuxutigox.mypressonline.com/alan_turing_book.pdfIn PDF document text
    • https://cdn.sqhk.co/duxisabaza/R4jcgfE/cat_mario_linux.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/cSjgjhd/ludo_world_online_pc.pdfIn PDF document text
    • http://liketime.fun/guitar_songs_tabs_and_chords_for_jingle_bellsuyt71.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/how_to_write_an_interview_introductionvd6b8.pdfIn PDF document text
    • https://vosifiteke.weebly.com/uploads/1/3/6/0/136049758/2286309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374376/normal_5ff5c17f5b52a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5fe1d868eaf49.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/rawugolef.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/2039482.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/818a13a5d6fdb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379032/normal_5fcd1e25801b5.pdfIn PDF document text
    • https://tutusilubejisev.weebly.com/uploads/1/3/4/5/134599447/f849e6225fb.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/0c7c88139.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/c7b9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455198/normal_60463afeda786.pdfIn PDF document text
    • http://dronextactical.xyz/248819360204eq6f.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/jcxMigZ/bendy_nightmare_run_song_reaction.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/cU901hb/frndly_tv_app_for_smart_tv.pdfIn PDF document text
    • http://storeeu.info/intermatic_water_heater_timer_wh21_instructionsacgd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gamelaluwer.myartsonline.com/chemical_properties_of_alkanes.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_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 5236 bytes
SHA-256: 87a4036ed52d7d7dbb254fdb2f1d6d7e57ee565ac3b0933c5b32a88bb157502b
font_01_sfnt_off00010f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F46 11772 bytes
SHA-256: de28bff053ea02536da5591746881b3dac95c3bda0622e4d60511db9e4950ccb

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