Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba8e9952e217d7d…

MALICIOUS

PDF

80.1 KB Created: 2021-03-09 07:36:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 714a156be0ed2c69cbae6852addc5db3 SHA-1: e128412e556a6d8781293352dac0ec92bbe583ca SHA-256: 7ba8e9952e217d7d1076e5cdb8d15bb19fab203508e2bfb08f641d4848b4196d
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, suggesting it functions as a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=what+is+the+purpose+of+an+expository+essay PDF link annotation
    • http://ca-manalapan.space/pokemon_x_walkthrough266g3.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/cesgcjc/20868913073.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/2lhaHvy/como_se_dice_mi_musica_favorita_en_ingles.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/he3vgfC/fawusasedumabuz.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/bTsgcif/boston_consulting_group_academy.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/ZLljjgh/66693810550.pdfIn PDF document text
    • http://gojepifega.22web.org/34545550900.pdfIn PDF document text
    • http://predouche.xyz/blank_face_sheets_for_makeupzd34a.pdfIn PDF document text
    • http://demask.fun/upci_ministers_license_requirementsdimlh.pdfIn PDF document text
    • http://jokidinavefo.22web.org/zezegorivigefofa.pdfIn PDF document text
    • http://faviwogewe.iblogger.org/how_to_train_your_dragon_2021_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/vakamuzawa/cP8gepC/block_craft_3d_online.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/diagcQq/xavonurotitanenodikivet.pdfIn PDF document text
    • http://tirojegexo.iblogger.org/jquery_form_prevent_default_then_submit.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/SDjjdDi/monster_energy_supercross_the_official_videogame_3_gameplay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_9022a14ea60a4e5996d389d432f0e810.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_6ea10eec81094a96ba3ca3d32f20f53e.pdf?index=trueIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_d5e12cb726734a34a46dd957299a22a4.pdf?index=trueIn PDF document text
    • http://xepazap.epizy.com/better_khalid_piano_sheet_music.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_d94287b507b9402f949cd5a478507f6e.pdf?index=trueIn PDF document text
    • http://sezusol.epizy.com/tratamiento_para_angina_de_pecho.pdfIn PDF document text
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_87325bf1ed9b4d5c8450c3eebc35a277.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 5140 bytes
SHA-256: fa8773a30c0d4ef34641448856f94952eafc52d3e89a263d0ea727f360e6b1ef
font_01_sfnt_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 10440 bytes
SHA-256: b2c712cdc37e884b617a36df9acb3f753334497d0830fe4b09014705d3da8fb2