Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d2a960c6070b71…

MALICIOUS

PDF

75.2 KB Created: 2020-12-09 04:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebdb5bef3f82656393200d8965646e6e SHA-1: 167e198814a6613387137198d063aba8db299ef4 SHA-256: 22d2a960c6070b710ea4d0277b8b081773a63c29c9198d9109134596deb7da69
154 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a game guide, which directs users to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing and trojan activity. Although no scripts were explicitly extracted, the presence of a malicious redirector URL and the overall classification suggest the document is designed to trick users into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/strik?utm_term=pubg+mobile+guide+2020
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/7289680.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lezopobigeza/xosofududegafamitazitol.pdf
    • https://static1.squarespace.com/static/5fc37b9d24b06a7eb30fb4b9/t/5fcc49b88a55f2188b6bfc54/1607223736981/punovamovejubovunexos.pdf
    • https://static1.squarespace.com/static/5fc35f47ec917750a3e7896c/t/5fc4e0a0fa04221c71b8e0a4/1606738082697/suddenlink_dvr_ref_code_s0a00.pdf
    • https://static1.squarespace.com/static/5fc283513dfdd95b60df5163/t/5fcb753585bc3a28a60ac0ec/1607169334465/compare_rechargeable_flashlights.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54909ee0f32b874a8d6c/1606374546432/the_fifth_element_1997_parents_guide.pdf
    • https://static1.squarespace.com/static/5fc101f96609fd0ee791e489/t/5fcbbee533fb14715cc2f75c/1607188198821/lenovo_thinkpad_x1_yoga_gen_4.pdf
    • https://s3.amazonaws.com/vipinib/aadhar_card_data_update_form_online.pdf
    • https://s3.amazonaws.com/kevava/randolph_county_register_of_deeds.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf1e13fdc31513a0e96d6/1606218210082/jikajitinifovatijomen.pdf
    • https://s3.amazonaws.com/tulosa/56232848500.pdf
    • https://static1.squarespace.com/static/5fc7855e1a9b7f6479380a92/t/5fc947516dcffd2c338f8331/1607026514331/ant_warder_human_nature.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2c.bin
3f7c5da8a84a7eef84684e183c2dfb5022bdc7b7feccdc79ca1561959be42d08
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 5076 bytes
font_01_sfnt_off0000fd65.bin
55b0d11c886789a7486eea268babb24232fec49924f6060961209c8a6322d4ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 10176 bytes