Malicious PDF — malware analysis report

Static analysis result for SHA-256 326b46769aeab5be…

MALICIOUS

PDF

94.8 KB Created: 2021-03-20 20:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: acedefd59ebbc418475c2768db92b2b3 SHA-1: 7a2efb6be30d1b980a6a9d5aa4a143b4d9131ebd SHA-256: 326b46769aeab5be9b0eaca7c62a2196a2aca94cbd6c5bb0c1f3e4a800ede8a8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. The embedded URLs suggest a potential redirection to malicious sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://dugedepap.ru/wix?keyword=mexican+plateau+climate PDF link annotation
    • https://xezudabumaku.weebly.com/uploads/1/3/4/3/134377243/8233228.pdfIn PDF document text
    • https://cdn.sqhk.co/jawafurovif/BXKgcif/download_stick_war_legacy_2_mod_apk_2019.pdfIn PDF document text
    • https://lolemifazez.weebly.com/uploads/1/3/1/8/131871650/famakole-vonuguvudopo.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/DPjfDVy/bee_gees_best_songs_videos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427785/normal_60012fb0ae764.pdfIn PDF document text
    • https://xivogere.weebly.com/uploads/1/3/0/9/130969247/kipetivuzukupigav.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/eggie5H/word_search_with_five_hidden_words.pdfIn PDF document text
    • https://mimidozeze.weebly.com/uploads/1/3/4/3/134357816/wiligujerivir.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/qhiChec/pokemon_wallpaper_for_ipad_air.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478133/normal_5ffcde5fa8f2a.pdfIn PDF document text
    • https://pulavirovedozas.weebly.com/uploads/1/3/2/6/132695401/2939863.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/AgghNJv/2_player_rts_game_3ds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fd6854fae826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_5fdb8a7ebc522.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/2172505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5ffcbe79abd55.pdfIn PDF document text
    • https://cdn.sqhk.co/jigijobofofa/ibkghhh/drawing_grid_maker_website.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/4232971.pdfIn PDF document text
    • https://jiditejebata.weebly.com/uploads/1/3/5/3/135305220/9078951.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/8Qvgd3a/35385575038.pdfIn PDF document text
    • https://cdn.sqhk.co/naforokafe/e6jejcP/68904666906.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/kHy7Njd/72512021666.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/eb2cdb9e-d43f-44fb-9566-05a0395e243b/880211215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbc4174-ea53-494b-812e-6e4b25b053c6/dolphin_gauges_speedometer_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e735925-7e39-4acd-9bac-5e51040c344e/54977953491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a262568f-6f35-44e5-8190-31700fe511ce/what_does_restriction_b_mean_on_drivers_license_in_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94478e3-2569-46d0-b5e4-82b38e40cbd5/50_shades_of_gray_full_movie_review.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_off000137b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B1 4880 bytes
SHA-256: 1fba78af2c89647decb1bea79a3f35fbafcf7081bfa10fc4386c390f740ff38b
font_01_sfnt_off0001484e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1484E 11284 bytes
SHA-256: bf30104505f1044cfda4b1e66c1af357860674a7e8bb2e30519f36f6e345ae91