Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fbae4db77ec6ed…

MALICIOUS

PDF

66.7 KB Created: 2020-11-20 01:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e63e90689e404bbe60f5e18aeb0b61b7 SHA-1: 96db65c96236d1fc3efbe8bcf480d91ec65d5a58 SHA-256: 08fbae4db77ec6ed01e24dc00a0cef7e98c57ba1b9bf99814944102a2ab8c66f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by a machine learning classifier as malicious. It contains numerous external links, including one to 'trafffe.ru', suggesting a link farm or phishing attempt. The document body, though heavily corrupted, contains references to 'Doom unblocked fun games', indicating a lure to a potentially malicious website.

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 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.
  • 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://trafffe.ru/123?utm_term=doom+unblocked+fun+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f9876c9178cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f904360d130b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5fb6edae3b812.pdfIn PDF document text
    • https://zatadiroda.weebly.com/uploads/1/3/4/7/134710216/padigaxotot_temosuvezo.pdfIn PDF document text
    • https://zozufawagizawag.weebly.com/uploads/1/3/4/4/134454621/b51a3cdaee6f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_5fb3c5ca26f30.pdfIn PDF document text
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/849142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5fb2c029cb803.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/tadovu/mahatma_gandhi_biography_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6673ac4d-f90d-4941-8277-3dacc8c3a7cf/wedding_guest_list_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/android_9_pie_update_pixel_2.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/cutting_edge_intermediate_dvd.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/rozezirixaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a848e997-e2e9-4d84-9bfa-f695dd8b6bb5/94432764946.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_off0000c861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC861 5448 bytes
SHA-256: 3e44af384f7fb52a3aae9039f4f29dda4cb1d382433a3627b2b2fdeb692d2e8a
font_01_sfnt_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 10336 bytes
SHA-256: 731f0b5996a548faa445d5485dd0aa1e35ffbdc9127cf84bb436af4ae17aa742

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