Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73eae66220ac635…

MALICIOUS

PDF

76.1 KB Created: 2021-06-05 22:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c6fc73f15182639e414b865df8bbced6 SHA-1: 0f60915ac31f676e4d09cf714d3bb5278218e7f5 SHA-256: b73eae66220ac63543be88c20c759b5808ac5b1120ac219d50e4528704fe3d08
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for phishing and a high ML score for maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'archism.ru' and a search term related to game downloads. The PDF structure also indicates it's a link farm on disposable hosting, suggesting a phishing or scam attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://archism.ru/pbw?utm_term=super+smash+bros+brawl+iso+for+dolphin+emulator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443619/normal_604b1c42dab42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506200/normal_5fdc92bf4c7d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443576/normal_60663d9e2f985.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5fdd8dbd998ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408587/normal_60208b4dba278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_604908ce77aac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368243/normal_5ffc5c91b1868.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471096/normal_5ff08b15ce4f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dekokos.pbworks.com/w/file/fetch/144421137/velidijipobavevuf.pdfIn PDF document text
    • http://gogoporiwo.pbworks.com/f/serway_college_physics_11th_edition_solutions.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/begomananalixusozigo.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/w/file/fetch/144565503/befuvinugapafubom.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/w/file/fetch/144569613/tamilrockers_hollywood_movies_tamil_dubbed_download_hd.pdfIn PDF document text
    • http://doxawadar.pbworks.com/f/95778917586.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/super_robot_wars_r_gba_english_patch.pdfIn PDF document text
    • http://seromazu.pbworks.com/f/what_movies_relate_to_romeo_and_juliet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/797835e6-979d-4c8f-8147-8c6aace5b3a5/beats_solo_hd_original_price.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144586773/student_exploration_calorimetry_lab_gizmo_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5cefe2-00bc-4afc-8d24-2bab737c47d0/gabaverafovub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ca3483-fe54-4883-bbe7-acd7d03ef950/how_to_thread_a_singer_serger_14u234.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 5616 bytes
SHA-256: 4c5c1405c9808d26e730932e08f70bb019470003b8ad0277ba6de6cce51290b4
font_01_sfnt_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 10232 bytes
SHA-256: 6c09473c45a835693d87328a02734c41606edad4b903d224db960f02f458a2bc

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