Malicious PDF — malware analysis report

Static analysis result for SHA-256 7241c9031d1a216d…

MALICIOUS

PDF

80.7 KB Created: 2021-03-25 10:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec8512157e58598f697438cf16dfaace SHA-1: a94075ea45598c93aa4c13dbca376fc2152e3e04 SHA-256: 7241c9031d1a216db0767da9e32e47de4cf12e7eda6a0c97194de63664259e57
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, with a prominent one pointing to 'zajinet.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent.

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://zajinet.ru/strik?utm_term=the+blind+assassin+review
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/ravefukatuvenavi.pdf
    • https://cdn-cms.f-static.net/uploads/4414495/normal_601cc2761bf4c.pdf
    • http://wazepewazivulil.mywebcommunity.org/39890256441.pdf
    • https://cdn-cms.f-static.net/uploads/4502920/normal_605a3ea41f1c9.pdf
    • https://cdn-cms.f-static.net/uploads/4386837/normal_60205bece7024.pdf
    • https://static.s123-cdn-static.com/uploads/4499300/normal_6008fe4edc2c5.pdf
    • http://pimesizawox.sportsontheweb.net/zilakepuv.pdf
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/5112905.pdf
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5ffed2225a6a3.pdf
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/78393da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cdf1fa8f-86e2-4ec0-bb49-4001628b084c/the_game_neil_strauss_book_recommendations.pdf
    • http://begujewirefe.myartsonline.com/42523323470.pdf
    • http://jaminuzifibe.onlinewebshop.net/xelirumone.pdf
    • http://zuxokoberibaw.atwebpages.com/43274271841.pdf
    • http://raxajabidadida.onlinewebshop.net/traditional_payment_system.pdf
    • https://uploads.strikinglycdn.com/files/e070532b-1199-4fcc-90b2-f822b545f33f/to_kill_a_mockingbird_chapter_14_quotes_with_page_numbers.pdf
    • https://uploads.strikinglycdn.com/files/ea27beef-b595-4ab4-9df2-23eb82abc758/the_order_of_things_free.pdf
    • https://uploads.strikinglycdn.com/files/fef8c6b4-6bae-42d0-b670-27e48e284d4f/timet.pdf
    • https://uploads.strikinglycdn.com/files/c449694d-d7fe-4fbf-8ea8-a0f0d14333f2/famozozo.pdf
    • http://lekeviwa.onlinewebshop.net/jexoxife.pdf
    • http://lijowavatajo.myartsonline.com/nemoped.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_off0000fedb.bin
0745ae954afa666af3b3b64d265298000b7c0722050f4257c2c0703e08554e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDB 5152 bytes
font_01_sfnt_off00011067.bin
9224f9327cbb39951de78d061debd52e0d5bc4f288f452219747ab97c0463608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11067 10992 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.