Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e200a09e6aa9b0…

MALICIOUS

PDF

79.6 KB Created: 2021-03-18 19:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f293fdac189624bc9a7be85e28b8524a SHA-1: 158d9cfc0c96c8a7f0c195043f69e30b5846ba39 SHA-256: 27e200a09e6aa9b09eb42c235676f4d77197fcd204cd5ec3b2a4ce278c721fa9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/123?utm_term=resume+format+for+college+application PDF link annotation
    • http://cashfree.store/what_are_3_unofficial_roles_of_the_presidentqkb0m.pdfIn PDF document text
    • http://oyuncuxx.com/9898313382002o07.pdfIn PDF document text
    • http://trynutra.shop/hidden_oracle_summaryy2mel.pdfIn PDF document text
    • http://wownatural.fun/nccn_guidelines_breast_cancer_2018b2x6r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fcd02ef6c07c.pdfIn PDF document text
    • http://mebel-albero.ru/81090724413n41zd.pdfIn PDF document text
    • http://xsafak.com/bajrang_dal_audio_songh0kmw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478947/normal_60521a41d92f8.pdfIn PDF document text
    • http://meetsoda.pro/1320535963w2gjj.pdfIn PDF document text
    • http://biolinkus.me/how_to_port_your_phone_numberhxa9v.pdfIn PDF document text
    • http://physcoo.com/watch_alex_rider_stormbreaker_online_free_123moviesn6oyh.pdfIn PDF document text
    • http://fb-ig-violation.com/bafejemeruzomevavig9op0.pdfIn PDF document text
    • http://fherixq.com/16924228746gbaq9.pdfIn PDF document text
    • http://znalomstvavip.site/the_tube_amp_bookinbkw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450896/normal_5ffd34c42d7bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500201/normal_5fd992cee24af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_604a347679fd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_2802329e37044417ad918d70abd7bc21.pdf?index=trueIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_2bfdf064d5d444fa8aea2096148b0908.pdf?index=trueIn 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_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 5340 bytes
SHA-256: 6486c3f92d4a4e3dcea5daefa52911c728ea3a70828c6166f10fa3df63bc1468
font_01_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 11780 bytes
SHA-256: 43ed73753088c50f705b78c93b2a960f7fbd3652c6eb5a8cb8e43fbe4abc1e0c

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