Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ede7869d0cd7fca…

MALICIOUS

PDF

81.3 KB Created: 2021-04-03 04:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ee8725816f6e00fac469622e42c774c SHA-1: d5903fa532989369ae590ee3444a2451ec5f2f28 SHA-256: 0ede7869d0cd7fcae7cdd3f209ca5687a6152b322cf63ffd51d75c8270048bfa
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the document's structure point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://seumenha.ru/strik?utm_term=how+to+replace+igniter+on+ge+gas+stove+top
    • http://gavediteriremuv.medianewsonline.com/xuxixosofewizosobafosupu.pdf
    • http://mojofaza.mypressonline.com/60579202745.pdf
    • http://lixebafevoku.mypressonline.com/problem_solving_method_of_teaching.pdf
    • http://sifinujox.sportsontheweb.net/atlas_copco_tools_catalogue.pdf
    • http://tujidal.mypressonline.com/honeywell_hz-789_portable_oil_radiator_-_black.pdf
    • http://zeruxejobimal.mywebcommunity.org/admiralty_jurisdiction_procedure_rules_2020_nigeria.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c1380ab0-1ac9-4b01-a7c1-e26fa42650f3/2170127710.pdf
    • https://uploads.strikinglycdn.com/files/4cf9075a-addf-4f2e-8951-19922e4fc296/5302879692.pdf
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_b889b00015b340d3ae26ec50ce96be4a.pdf?index=true
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_3db45ae1cfd046259a9b0b8f9e6ecf01.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d9d236f0-455c-48e6-812a-db09a0b5fd5e/xbox_360_eject_button.pdf
    • https://80ce5912-1c67-4773-adf4-abf614566e91.filesusr.com/ugd/acb48a_c208212ae345413d8e70a8cb3afc5a86.pdf?index=true
    • http://wegorabeg.atwebpages.com/aviones_de_papel_libro_gratis.pdf
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_e4088fe13e7e4a81b7745405296cc49a.pdf?index=true
    • https://fe4fa097-7109-4367-a76b-bc1f2b7936f3.filesusr.com/ugd/ef6f93_7370692ecb4847faa2c942a2661f7e37.pdf?index=true
    • http://lavisekenesavof.myartsonline.com/73933652775.pdf
    • https://uploads.strikinglycdn.com/files/be254097-8819-4cb6-9724-c675b85f41ba/nadavetigonuwevowar.pdf
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_ba28bc9279794ea5bcd862c3d9606f5a.pdf?index=true
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_437370d088444d4db654ff9c9f8c6bc0.pdf?index=true
    • http://lapetagalelan.myartsonline.com/18677343383.pdf
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_013ef9663c87484fbe1227b443a893d7.pdf?index=true
    • http://piwolimosopobu.myartsonline.com/belajar_bahasa_jepang_free.pdf
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_8ba04aa03b414f87971d77a01d0cad9b.pdf?index=true
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_128464408c8946878b56c4de41830027.pdf?index=true
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_206ed89cb6294c279ef350193b48694f.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55f.bin
3a2dde087c46ff5f2b888330519a38daa7547befce888210da0bf57eca4cf86e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF55F 5212 bytes
font_01_sfnt_off0001073a.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1073A 1800 bytes
font_02_sfnt_off00010fc8.bin
4accab17486b8e7829e8d833de473ad12a42cf79643d3d544ad83abea3eb4cda
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 10904 bytes