Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae215e36ac17bfdc…

MALICIOUS

PDF

80.1 KB Created: 2021-03-15 11:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 38dcf0eea5fbc44aedd07175264d062a SHA-1: 6c7987c6659fa6d085a378d6faeff700a8df3f05 SHA-256: ae215e36ac17bfdc7dc9a2981e2793939ae3906552d73eea9f0e32ff51591d34
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files. The primary URL, 'https://zajinet.ru/wix?keyword=bosch+fridge+freezer+manual', suggests a lure to trick users into downloading potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=bosch+fridge+freezer+manual PDF link annotation
    • http://rabekapudi.iblogger.org/aking_prinsesa_music.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/eUMyiiV/project_planning_tools_free_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/jeieUxw/hill_climb_racing_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/icchguD/52925578167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_3ee4d7d1904240be90f3d0237079d264.pdf?index=trueIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_c6936ff89653454ab41904f613f7b574.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_2acdc8d831974768a99db6bb71c7dc0b.pdf?index=trueIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_f0b690a2c0fc4887b55edd7b8b387a35.pdf?index=trueIn PDF document text
    • https://7a69a04d-b0b3-478e-a927-895b34d3dd44.filesusr.com/ugd/159848_c6f353fc6f2c4c0ebc34c34b52bbba1b.pdf?index=trueIn PDF document text
    • http://divimoxigorube.epizy.com/banarasi_babu_movie_song_video.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/vufimawafibovilakux.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/gulosunixavusuxisi.pdfIn PDF document text
    • http://muburenimigalu.epizy.com/peruvadavore.pdfIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_461a74d66b6e4dfdb232283b2ff67c45.pdf?index=trueIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_984680ead2224a1b941bc9ef8dd67a74.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zubata/ccsuweb_b._ed_exam_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF3 5336 bytes
SHA-256: c859d14c05fc1b72f72bb6ac5613d65af2ec21d9ed33d4a709367bd1d1fcceec
font_01_sfnt_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 10540 bytes
SHA-256: 6c3a3c051a5ef6dc43ff041c6ba90e588bf79461c23d39d4f545728c7efceb5d
font_02_sfnt_off00012502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12502 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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