Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6a239d56b92524…

MALICIOUS

PDF

75.9 KB Created: 2021-04-21 16:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 66e7f2a03f63e9ec0d3f7a096b52a57e SHA-1: 761bde00851a1725c3fceede07a9db4bb3bb5aec SHA-256: 0c6a239d56b9252459931874aecb0fc6530f94b5a570255db2afe2682b00b5b2
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily garbled, contains keywords related to free graphic novels, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=wings+of+fire+graphic+novel+3+free+online PDF link annotation
    • http://zujejilolo.scienceontheweb.net/degarmos_materials_and_processes_in_manufacturing.pdfIn PDF document text
    • http://bolawixefop.mygamesonline.org/beware_of_the_dog_short_story.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_604ca1dfc7a6e.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/salefirixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472775/normal_60524d60e0ebc.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/carnivores_dinosaur_hunter_downloadcjngj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_600e3ddae94b3.pdfIn PDF document text
    • http://alfa-quest.ru/magnetic_barrier_gate_manualjcny6.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/namefasopilutomofupawafaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_6050ddfe01351.pdfIn PDF document text
    • http://jepegupunu.mygamesonline.org/bionic_turtle_frm_part_1_practice_questions.pdfIn PDF document text
    • http://appletopshop.ru/dobiripobejofibuvilotajifa58tg.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/mathematical_logic_introduction.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://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_2f34aeefff3543068030c46d6b9e5e74.pdf?index=trueIn PDF document text
    • http://nitubak.atwebpages.com/archery_for_dummies.pdfIn PDF document text
    • http://sopavame.onlinewebshop.net/wiwar.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/chevy_aveo_2004_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/pivefalorozexaxegeke.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_7623a084840d490eb435eeaceb6b5746.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/sifegufilugowakiwedaxu.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/burn_after_reading_book.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_off0000da21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA21 5224 bytes
SHA-256: 0d806971e5835db3aa5e4c6d08cce68dfbf9e6dd3503b5e26f07defeb19cae7f
font_01_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 11436 bytes
SHA-256: be42165f8f775a956de8114e5b83b9404022eba34773bfbe2eb458ec71af9bc8
font_02_sfnt_off00011255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11255 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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