Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe736c26969d99c8…

MALICIOUS

PDF

75.8 KB Created: 2021-04-11 15:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 60f2923600fdb99c7d4151363f2b2b37 SHA-1: 5686f57b7f99609eb72cce68edfd05ff5d8a6eb6 SHA-256: fe736c26969d99c839532a2f826405d2a460b997f850b5dca781b79928eb63a0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('fokemale.ru') that is likely used for malicious redirection. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting a phishing or malware distribution attempt. Although no scripts were extracted, the overall structure and URL usage strongly indicate a malicious intent to redirect users to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=origami+box+with+one+piece+of+paper PDF link annotation
    • http://sawemawe.mywebcommunity.org/clinical_pharmacy_handbook.pdfIn PDF document text
    • http://vabakavolageni.22web.org/lesebexiwakasavebigik.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/chronic_obstructive_airways_disease.pdfIn PDF document text
    • http://riwalimuj.scienceontheweb.net/mahalaxmi_calendar_2020_download.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/free_journal_articles_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/43780131572.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/miziziwelenikirena.pdfIn PDF document text
    • http://wugupijejituzog.rf.gd/6020698022.pdfIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_0892610ba2434c84962518db15ea72d8.pdf?index=trueIn PDF document text
    • http://rulamiji.onlinewebshop.net/35903432757.pdfIn PDF document text
    • http://kebojupevanivi.rf.gd/37370859886.pdfIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_6706f826794c40d6ba2b4f3002ce31ee.pdf?index=trueIn PDF document text
    • http://revudipepofaten.myartsonline.com/special_relativity_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90eca885-6cb4-4cc5-9ec6-f1217cb9e701/best_language_for_android_app_development_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/accidente_cerebrovascular_2019.pdfIn PDF document text
    • http://nanaxidimidi.atwebpages.com/38460335494.pdfIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_d0dee7f33735473e97b54e18a70006ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5089fec8-46a4-4031-960e-f3d3364255e9/diary_of_a_wimpy_kid_book_15_audiobook.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_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 5544 bytes
SHA-256: 24894de4654ce2be21d212238316a3348a5981676dda289cbddd0784e2e97180
font_01_sfnt_off0000fbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 11404 bytes
SHA-256: 321fa27e96cf58414c040fb493f0e96877a79b88187632a5406390ac11932f32

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