Malicious PDF — malware analysis report

Static analysis result for SHA-256 61440731403af219…

MALICIOUS

PDF

77.8 KB Created: 2021-03-19 14:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 658a6728bf77fb4af76a4c7f008c1984 SHA-1: 7361f513302abc79b2a8952c7aaccfae6885ab54 SHA-256: 61440731403af219a39c120e51cf512c2dbb96572eb3f1b0c19334fa938fb01d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or redirection mechanism. The embedded URLs point to domains that are likely involved in distributing further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=bullet+force+mod+apk+android
    • https://cdn.sqhk.co/pafevola/jghgihe/best_hashtags_for_tiktok_likes_and_followers.pdf
    • https://nezuzubes.weebly.com/uploads/1/3/5/3/135327702/lazatujegokuloko.pdf
    • https://cdn.sqhk.co/nemoludajedu/ohc7k9V/my_verizon_fios_application.pdf
    • https://cdn.sqhk.co/tigadikem/iaqEjhU/bounty_hunter_cowboy_themed_anime.pdf
    • https://cdn.sqhk.co/retugatodof/bvBuehj/toxeki.pdf
    • https://wilukogata.weebly.com/uploads/1/3/5/3/135388132/5388700.pdf
    • https://cdn.sqhk.co/logulemuset/jjSaytQ/fovesijagivuruwaj.pdf
    • https://cdn.sqhk.co/kukojuvata/WGicu36/60183917654.pdf
    • https://cdn.sqhk.co/koroxofusino/MjixrhF/kivixotevisaloxukarura.pdf
    • https://nitevugumosu.weebly.com/uploads/1/3/4/5/134526644/zipizitutizoxelo.pdf
    • https://mebemawadaj.weebly.com/uploads/1/3/5/2/135295691/5868610.pdf
    • https://cdn.sqhk.co/xedufoga/agdgiiq/welasegexirunedilusovid.pdf
    • https://kavosoxevab.weebly.com/uploads/1/3/0/8/130874108/vuxalif.pdf
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/jeviboreretu-jodewa-wagefasobakonif.pdf
    • https://jesokalatozu.weebly.com/uploads/1/3/4/5/134591365/4f0ffdc0c.pdf
    • https://cdn.sqhk.co/navotezive/BGhbgoa/zoxoginaxowege.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/910f724c-a1ad-40ec-88e0-a6a735cddfc8/pool_heater_error_code_lp.pdf
    • https://uploads.strikinglycdn.com/files/62a89e00-8b22-4c9b-bdf5-fc77d077c2ea/81209838902.pdf
    • https://uploads.strikinglycdn.com/files/c865f733-f49a-4794-a7d3-9ecc7c870001/matozotovixuluwasixebo.pdf
    • https://uploads.strikinglycdn.com/files/c283e43d-68e3-4794-8bee-8d18b9323db7/sinopsis_film_a_river_runs_through_it.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f138.bin
b3ae885a906111b146c762b2d6cc6f70d963a7e27129177c0c4038175088605d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 5236 bytes
font_01_sfnt_off000102f5.bin
980e3f062b9b8753b091941dee8254d436d829a9a079e01dba69b1e4c7991fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 11944 bytes

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