Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ed1ebeb4924077…

MALICIOUS

PDF

75.9 KB Created: 2020-12-24 20:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8f4770fbbb5a16525e3dbcb6e4d394b4 SHA-1: 92acd26dbf863f64cf6465e89bc420b490462200 SHA-256: 06ed1ebeb49240777e7bc27abcb9b62ee135b3b63978bf52791d09acb7a08526
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm pointing to various PDF documents. One prominent URL, 'https://trafffi.ru/aws?utm_term=chicago+manual+of+style+oxford+comma', appears to be a lure, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffi.ru/aws?utm_term=chicago+manual+of+style+oxford+comma PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417408/normal_5fafb4d2aea11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_5fd65d7bafdbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_5f9fcf2c76397.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fce486ed6b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_5fc032a4ac210.pdfIn PDF document text
    • https://lavofimezifo.weebly.com/uploads/1/3/4/3/134341346/fd380688bc25f0e.pdfIn PDF document text
    • https://nolomiwasuwizug.weebly.com/uploads/1/3/4/6/134661688/funet-mebutelona-rubalezizumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383698/normal_5fcfee8bdad5d.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/16290059f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460954/normal_5fd1532209e8d.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/gapivegek/ignition_temperature_of_fuels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ee8eb3-f2a4-4481-8092-c8b30b62f0d9/88679960935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc061d9-e01f-43cc-8399-0cc3a0e4c7de/marvel_contest_of_champions_hack_for_android_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19302dfb-030e-4e51-82d6-9efe7ba9986c/retro_tv_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/razazubasivezarabutamew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55897c54-171c-40fd-9b16-a89e4fbaab61/pilot_mountain_middle_school_supply_list_2019.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_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 5508 bytes
SHA-256: 30aba09d734c33cd2bedfd8abb379872f1212abd9cab1ae5d3dab125d94aed4a
font_01_sfnt_off0000fc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4E 11320 bytes
SHA-256: a85b23a9e13d5e6a38b35bfbd2d34275090654eefffcaa0477feb34151252a95

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