Malicious PDF — malware analysis report

Static analysis result for SHA-256 5769c57e5b06457b…

MALICIOUS

PDF

81.5 KB Created: 2021-06-11 06:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 554e37b677091658a723a40a9913d4e7 SHA-1: 4093dfad4ebf035385fd448c1c222b91add8a8b2 SHA-256: 5769c57e5b06457bb6f97eba11251a42a5c175482098ba4f7d16d1a7b62132a5
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document leverages a lure related to '50 shades of gray full movie torrent' and contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crewmak.ru/pbw?utm_term=50+shades+of+gray+full+movie+torrent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469847/normal_6016e0575c36f.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/129562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_602550009253e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_601b1a7475e6f.pdfIn PDF document text
    • https://safubijob.weebly.com/uploads/1/3/2/6/132682970/f116070237fe3.pdfIn PDF document text
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/7388005.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4451544/normal_60b00448864d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_6041b1e536f23.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/8fe94fa89057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_602770350b0b6.pdfIn PDF document text
    • https://gexamefirizawem.weebly.com/uploads/1/3/4/6/134668325/9692924.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5fe4f33ecfe43.pdfIn PDF document text
    • https://bilujujopubeda.weebly.com/uploads/1/3/4/6/134661541/wuwodul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_5fd78920b0064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5fea35c74196a.pdfIn PDF document text
    • https://punelita.weebly.com/uploads/1/3/4/6/134679726/puvur-mizunekasu-sojovebaxudug.pdfIn PDF document text
    • https://pujatafar.weebly.com/uploads/1/3/4/8/134854232/4082496.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mogulobobis.pbworks.com/f/brainly_unlimited_answers.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/laletetaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7356d76f-6992-4e75-b64f-9303678a8b78/37029698263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3e7715-bab9-4383-8588-407188f00416/5985464602.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/f/tobivivosinogoredi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884336ce-1580-42d2-aa8e-4f7e2585ca87/ejercicios_de_williams_y_mckenzie.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5656 bytes
SHA-256: 4d5386eb2ef38bf81ed7627c0ef4fd9c6e3c2393adef1507f15627d75703951d
font_01_sfnt_off0000fdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCE 11044 bytes
SHA-256: f3c6bc7d4b1be1e0b03867f0688fb9227c47600ab42d61cdf145accf9d429142
font_02_sfnt_off0001235a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235A 16060 bytes
SHA-256: 309a3b1fceaa03c0c9bd2e8b4443fcfd5b986ddbb92b7334120c253d92888431