Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80ad574e2b39825…

MALICIOUS

PDF

79.8 KB Created: 2021-05-17 02:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 301a246fc5c349405ef6ce248438e374 SHA-1: 84cd5ac1e24100ddef2d720229ecdfb2e207b546 SHA-256: f80ad574e2b39825bba929833b60e722145a13706a88b0e2d53c0eb7e034ea2b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ponafet.ru/strik?utm_term=does+chick+fil+a+have+good+mac+and+cheese PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5fd974f1c0600.pdfIn PDF document text
    • https://jowujutaxafekul.weebly.com/uploads/1/3/5/3/135348014/6004908.pdfIn PDF document text
    • https://cdn.sqhk.co/nepopagugela/Hdgj0jg/messenger_for_whatsapp_web_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414159/normal_5fcc37aa43cba.pdfIn PDF document text
    • https://nekonidi.weebly.com/uploads/1/3/0/9/130969497/bajomedelex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503533/normal_6018e8823d2f5.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/hgzgcgd/fesuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_60211668cdcdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453890/normal_600b4667e96ec.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/jefad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391921/normal_5ff784a002c08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_60418f0f4a298.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/cJtjqha/baby_phone_toy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_60261175b88f9.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/d9gcoMP/bubizowasizivetow.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/7d0fbc51419.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuwudedi/2xzjdjj/crazy_racing_car_3d_hack_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403414/normal_5ff142358d128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_422c396df5494cf6b07046efd3c0b0e3.pdf?index=trueIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_1aeda5a049d84f2586bd52c02768a294.pdf?index=trueIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_7fbe30fda45446a898d492228451a718.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_2ade074595de42339944f37f54d458b4.pdf?index=trueIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_a851392775034e9492112c4424d3f6f1.pdf?index=trueIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_32374d8679e841949dd611f23a58d168.pdf?index=trueIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_a7593501c35c4f4388cf41b5c8110388.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_2b11c9253653418086c8eece5930895d.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_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 5460 bytes
SHA-256: 92501369511bf109cbc9cc96eab7aecce5e269cd6fbdb0a59c15cfe319c053be
font_01_sfnt_off000109cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CD 11688 bytes
SHA-256: d96c5aad62d69f75205f98f15df231bfc5918fd037ed802b55e9ed9cf947e2b3