Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7f6e8a469b48b4…

MALICIOUS

PDF

77.8 KB Created: 2021-06-01 09:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8df99d2fdb7a4ecdf87b184a9818fba7 SHA-1: 1238d91f871a6c71bcba1d282c4305da040e8a10 SHA-256: 3d7f6e8a469b48b435fb39894a0a9fcaeb015283e4eae69fe2048f1a8a44c3d4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains a large number of embedded URLs, with one prominent URL pointing to a site that appears to be a link farm designed to redirect users. The presence of numerous links suggests an attempt to obfuscate the final malicious destination or to maximize the chances of a user clicking on a compromised link.

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 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://pistant.ru/pbw?utm_term=the+scorpion+king+%25282002%2529+hindi+dubbed+movie+download+mp4moviez PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492901/normal_60302022a13d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5fca93dfa0676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_604623e08ed48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_606d1e86bdb5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482424/normal_5fd91a5a42369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369630/normal_5fe019029f0bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447450/normal_606a7ad1a6936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_606e8a91e40f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fcfe6b5ae102.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35cad61-9445-41a3-9d95-1f029556cf3b/29391802562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7adafb27-ffc0-4cc9-8682-21351fc2346c/jatixixonuxuzerarijinewal.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/ghost_windows_7_32_bit_free_download_full_version_with_key.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144432753/causality_and_determination_anscombe.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144427479/deivangal_ellam_thotre_pogum_mp3_song.pdfIn PDF document text
    • http://finebov.pbworks.com/w/file/fetch/144449745/absolute_advantage_and_comparative_advantage_practice_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6ded1d-8ca8-4e5d-adbe-3a3af2420785/nepivejuluwobi.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144444150/sulenufitiwekawata.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/w/file/fetch/144449571/35973199142.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144428241/how_to_level_up_fast_in_prodigy.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_off0000ed5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5B 6360 bytes
SHA-256: 2f46da7739725074fa06db60f28a4bd2570f0ad7a5885386fe8cc8281b50a509
font_01_sfnt_off00010304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 11288 bytes
SHA-256: 95342010b781b49ddc716c57e9548567bd0c0752bf6a16de8452dcf174cd8c7c

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