Malicious PDF — malware analysis report

Static analysis result for SHA-256 2020f6daed0ca200…

MALICIOUS

PDF

79.3 KB Created: 2021-03-28 00:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1ba6df12519cb92a9b483a3d6daa7012 SHA-1: 05f481d48bb15aeb9186bd0baa44325f8de93117 SHA-256: 2020f6daed0ca200ba6664e40ab5b8b6010f2eb5065d54f53aa63e3939491f6b
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=chrono+trigger+snes+ar+codes PDF link annotation
    • http://italylife.pro/fetirakagijoxuwtfy5m.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/6rigjeY/14273622274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454048/normal_6009bc7b67919.pdfIn PDF document text
    • http://deemonatrafik.xyz/python_data_science_tutorials_pointqdh9g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_600e11e122556.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/iejiGFa/trick_shots_fortnite.pdfIn PDF document text
    • https://cdn.sqhk.co/warugariluxe/ijggm1D/cruise_lines_from_nyc_to_hawaii.pdfIn PDF document text
    • https://sivamodinuna.weebly.com/uploads/1/3/4/7/134762665/3617df32.pdfIn PDF document text
    • http://heleogose.online/94346532758qlh1h.pdfIn PDF document text
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/5547175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465386/normal_60240ba063ff6.pdfIn PDF document text
    • https://vasaradafivoza.weebly.com/uploads/1/3/6/0/136048391/tagugoxevadetizapiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_5fdac5a68f6ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_60508e58e8380.pdfIn PDF document text
    • http://nnorm-id.com/what_are_the_features_of_present_constitution_of_nepalm8wlx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb36cfdd-85bc-4dc6-b8bb-9f6571027d3f/how_to_maintain_a_nuclear_power_plant.pdfIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_09ac26ec598d4fad892003a87e1787ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0302ec-5f95-4d50-b530-c56044991a02/trig_book_answers.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_257be1349b434f8895795fdf9b28dd01.pdf?index=trueIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_8f756248d1374578b1028f6751573b08.pdf?index=trueIn PDF document text
    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_02cbb3dbf9f446258ae25fe6f0df4ea2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3834b9d-1448-450d-9ea2-898dbd0cdffc/how_to_use_a_vtech_phone.pdfIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_4dd0c4abc0974c4e9250948c8e684e49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbac075-df0c-4d3b-9e51-cfbf6edfe42f/how_to_check_4_wire_oxygen_sensor.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 5076 bytes
SHA-256: 3f58c409fd42c21c2e246fedbe3334210eaa0c902c749f43adcfec113b295527
font_01_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 11432 bytes
SHA-256: 00db66cf39a014e4deef5da2fa39d5fb664ac0c5650f85e1a52574743c114bad