Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe0f0778cabe990…

MALICIOUS

PDF

82.6 KB Created: 2021-05-10 23:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 27951d57218c1a8f92e43903707e2386 SHA-1: 57bcf63382339bf8b485a45581b221e3bb8770a0 SHA-256: bbe0f0778cabe99079289598fa500372c08a4bb16099bc78ad56077681eb714b
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://seumenha.ru/strik?utm_term=how+to+fix+keurig+duo PDF link annotation
    • http://olx-delivery.cc/melody_music_studios_llc_cary_ncsolxd.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/sozij.pdfIn PDF document text
    • http://sayfelengs.space/58670747172nmsys.pdfIn PDF document text
    • http://steelsho3.club/27684421059u393m.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/79914392561.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/eFihTLs/brain_training_for_dogs_video.pdfIn PDF document text
    • http://replyua.site/is_step_1_harder_than_step_2okwr7.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/Cjcwagj/2nd_birthday_cake_images_for_girl.pdfIn PDF document text
    • http://kinokaiff.space/2459651348421pfk.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/hgi5uPA/85372887635.pdfIn PDF document text
    • http://gk-kuban.ru/55800745585tnlfg.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/jgMhdic/chocolate_box_cake_recipe_ideas.pdfIn PDF document text
    • http://wugegifa.getenjoyment.net/lorofejoraxawugedi.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/c4aedfb7-5351-4227-a99c-c2698c858bb6/4430023348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e21cf9-ad0f-48c5-b22b-e7b387ee8dc6/odyssey_book_8-9_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b480764-2d53-43e1-87ad-179878d1532a/florida_residential_lease_agreement_for_apartment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ce4103-6cdf-4d2f-8a5c-a80c77d69cea/45928656106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4b045e-6f9e-48e2-93a3-14d2c75b7f72/23905196637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be3a5ce6-f265-4b44-b750-f6961172ce10/26351158525.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_off00010915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10915 4840 bytes
SHA-256: d0138956418a019022d3faafd8d7f963de71c73eac37835f5c171c5031428d1a
font_01_sfnt_off000119b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B2 10500 bytes
SHA-256: 1ff44148fde7d39d2bacca0b8422c428a8a6f7043b2fb51886b679dc15137b08

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