Malicious PDF — malware analysis report

Static analysis result for SHA-256 de69fb0046e60dce…

MALICIOUS

PDF

74.8 KB Created: 2021-04-23 15:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 01c78174646d3543ad3cd27e0426168c SHA-1: 2f477fced24818f58d68ddb41c503b11caacfee9 SHA-256: de69fb0046e60dce6bd485448bb83cbab7da6c1e85bbe15e9e5eb24ad0a4c4fd
126 Risk Score

Malware Insights

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

This PDF document contains numerous links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The primary malicious URL, https://xajibur.ru/strik, is presented as a "Best Buy sale on Beats headphones" lure, indicating a phishing or scam attempt. The document's structure and link farm behavior suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://xajibur.ru/strik?utm_term=best+buy+sale+on+beats+headphones PDF link annotation
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/54330ae13.pdfIn PDF document text
    • https://fukidupedogof.weebly.com/uploads/1/3/2/8/132814182/joruvitufogilipi.pdfIn PDF document text
    • http://grenkasalo4.xyz/wumepekubapojinixeve56nur.pdfIn PDF document text
    • http://trokot-shopnew.online/parallel_circuit_calculations_worksheet_answers9bzig.pdfIn PDF document text
    • http://zapixexarepol.medianewsonline.com/60195578627.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/career_paths_medical_teacher_s_book.pdfIn PDF document text
    • https://keguvetazako.weebly.com/uploads/1/3/4/7/134702613/586049.pdfIn PDF document text
    • http://blognews.top/soxinawege77j3v.pdfIn PDF document text
    • http://wegansit.space/123760594334k6co.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/g9gcjgt/78571655968.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/wizukus.pdfIn PDF document text
    • https://cdn.sqhk.co/teforoke/LiaghzK/11986986428.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_7a78f9a5988d4021a74a0bf862a29408.pdf?index=trueIn PDF document text
    • http://naburonip.myartsonline.com/allyn_and_bacon_guide_to_writing_fiu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18233b4-a945-4a7f-8915-b06aaadf3a64/is_wahl_trimmers_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7809e5f-bad0-414a-991a-70b67c599c27/58737952502.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_008db9737479465a9df309a0aa1c0cba.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_fe896fccd72240a2a5f2c35d7dea639e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a28dffb-bf3f-42b5-adb2-5a407cbe0921/how_to_reset_chimes_on_grandfather_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5e142f-c783-4bb1-805e-849a7eacaa4b/how_big_is_a_208cc_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a9a89bd-7d82-4bf1-bb73-4287b545f433/determination_of_the_empirical_formula_of_silver_oxide_lab_answers.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_off0000e5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D8 5244 bytes
SHA-256: 813df169cfb1a1c1091695e14ab950a8b0f87530e11cb9a4d1fdf7721324f15d
font_01_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 11284 bytes
SHA-256: 03012a0ecc79261f5669c92427a6ce4c177cc0cc732adf0688013f5e348098f2

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