Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0ba8b27f7cf79a…

MALICIOUS

PDF

83.1 KB Created: 2021-04-10 02:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9ae36d65132cf57a3fea639c98c54c4d SHA-1: 7bab9fd8166c084d1a88451778e513c8f40d5b92 SHA-256: 2f0ba8b27f7cf79a4ae5b730de9cb9f040c6e276c2a4c0446f32be323797eaf0
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, including critical alerts for linking to known malicious redirectors and a link farm on disposable hosting. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the embedded URLs point to suspicious domains. The primary attack pattern involves redirecting users to external content, likely to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=are+power+supply+cables+interchangeable In PDF document text
    • http://xamejaduxak.22web.org/bible_nkjv_for_pc.pdfIn PDF document text
    • http://sokolov.fun/migizibavumutasaloll1g9.pdfIn PDF document text
    • https://cdn.sqhk.co/govamopega/fljb5gj/png_background_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/jfiaPgj/nifad.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/soTBgcA/fut_20_creator_apk.pdfIn PDF document text
    • http://ridunculus.com/sora_yori_mo_tooi_basho_ostchx6e.pdfIn PDF document text
    • https://cdn.sqhk.co/lasozigur/jhcgjie/bocio_difuso_tratamiento.pdfIn PDF document text
    • http://edapog.online/arcsoft_photostudio_5_manualkh7ue.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/7HhfJrD/alcatel_one_touch_4009d_firmware.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://s3.amazonaws.com/babuxufarizuxur/here_is_new_york_democracy_of_photographs.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_689a1e1b4f0f46a89be50604b6ae9057.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/51714310532.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_ee775810eeeb44ba8b2725bc71bc8c54.pdf?index=trueIn PDF document text
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_89aa5d0552d44fbd9b9ccb3774318dd1.pdf?index=trueIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_a358a7afd198445c9eff33574d472b55.pdf?index=trueIn PDF document text
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_3f738b41cb374a39b859ac81568ad99d.pdf?index=trueIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_f62fdfa8595f437b9d8ab2ddc3dcfd9f.pdf?index=trueIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_300a31a598f546a287de292b12420dee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/origin_of_islam_download.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_dbdda2e2ea274ef39d33443a680ad1c6.pdf?index=trueIn PDF document text
    • http://volozixoxogibe.rf.gd/free_baby_shower_invitation_templates_for_girl.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/34451939858.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_caa108e3530141ada77c7cabbbf92cf4.pdf?index=trueIn PDF document text
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_b72ed07edb83490d9d8799ea4173a510.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/fan_to_circulate_wood_stove_heat.pdfIn PDF document text
    • http://rajokonola.epizy.com/40657612684.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_off0000f83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83F 5400 bytes
SHA-256: 09bf80271b3a8843a1504f76057543d9c38861320069c9cc736e9c02f8059884
font_01_sfnt_off00010aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA9 10932 bytes
SHA-256: 7cfbc4ba0189128b5cd67e99607134ca0d95349bc826fd549a79071a1dd896e3
font_02_sfnt_off00013010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13010 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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