Malicious PDF — malware analysis report

Static analysis result for SHA-256 067e66b1dffe1ef3…

MALICIOUS

PDF

76.6 KB Created: 2021-05-11 22:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0bd96181695d55e66ba96b0583273900 SHA-1: 435fec4a1f9d4c87b5ce3e0e1936772f4a720548 SHA-256: 067e66b1dffe1ef35da374579ebcb1c5c67611026db92fc76da7682b8c695a55
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/strik?utm_term=how+did+the+new+deal+help+end+the+great+depression PDF link annotation
    • http://bet-info.ru/53824902084qch6v.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/elyhahg/bupedipewef.pdfIn PDF document text
    • https://cdn.sqhk.co/jasuxerazifo/ft3hdgd/nezedewigotil.pdfIn PDF document text
    • http://pelistens.xyz/keyboard_shortcut_keys_in_excelaetoz.pdfIn PDF document text
    • https://cdn.sqhk.co/zunowexafa/d9oid3a/color_museum_new_york_tickets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_604d0703042c1.pdfIn PDF document text
    • https://cdn.sqhk.co/rirerujel/dZmhfge/fpv_freerider_free_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/9vW3EoO/64009137739.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_6004ccfbb33e0.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/Riajdig/ultimate_guitar_chords_tabs_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/ig6RgcX/rush_hour_2_cast_isabella.pdfIn PDF document text
    • http://skidki-day.site/47805017185hfrcy.pdfIn PDF document text
    • https://cdn.sqhk.co/jigotove/jeahfhg/idle_heroes_unlimited_gems_private_server.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_601fb3e804373.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/gLieYur/auto_parts_store_japan.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/fuwimepokazinizapuxoli6d65i.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/236c6fa0-76e9-4de7-9315-b8cc87004d41/huskee_riding_lawn_mower_starter_solenoid.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_c6db34415e0748eca815175fad7dc8ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76f6074-abfe-43ca-88a6-135a933bc3a5/calcular_integral_online_paso_a_paso.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_921b82866ecd4cecad7629431b890a98.pdf?index=trueIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_a72eda0080f2438a85bcfa01602bd959.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_5617393a0591466cbd33a10f823e1c54.pdf?index=trueIn 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_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 5272 bytes
SHA-256: 529962ab34f0644119ca661133ee6af866b9480bf85ee2476ec7173f7b671a82
font_01_sfnt_off00010029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10029 10560 bytes
SHA-256: 05812a7b41973faff12b8ef2fab109406c501e7edaa53db108693a7f44a68e39