Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd59188f8d627917…

MALICIOUS

PDF

70.8 KB Created: 2021-01-25 05:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 581577977ad587569e4d97785ee9b884 SHA-1: 02d5fc518f757f05e9b0ee415fb79ea203d36bb2 SHA-256: fd59188f8d6279178894f7c87f679e346ad72203c88d2ebcbafb96d98db3cdc6
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The presence of an external URI pointing to 'traffine.ru' and a heuristic indicating a visual download button suggests a phishing attempt. The ML classifier also strongly indicates maliciousness, supporting the conclusion that this PDF is designed to trick users into downloading a payload.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/wb?keyword=supertux%20jogar%20online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450256/normal_60070074b42c8.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/9he1chd/bobukawujatenikeputodaj.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/rOhbygi/direct_line_driving_app.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/iiieWgh/exonerated_definition_in_urdu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495034/normal_5fde7947df1dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5ffbbfbe4581d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382770/normal_6006eabba164b.pdfIn PDF document text
    • https://cdn.sqhk.co/duziketopefi/chhdhgM/list_of_all_lee_brice_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/puranajav/hcgWEgd/sabuxekalew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474475/normal_5ff6af477094a.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/iggPFii/81183258830.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/kefefetafij/28353603124.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/battlelog_web_plugin_firefox.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/46940630822.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/48297039997.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/two_way_solid_slab_design_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/27263911912.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/kivibino.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_off0000d8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BB 5056 bytes
SHA-256: 7a4739d2e653491ca3261972d2072efc039e3a0bb4572e581da0ccb29bcb4780
font_01_sfnt_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 10872 bytes
SHA-256: 200e861dfaaf25fe31e518573b7ee5a472ad46ae987d4900f6849c633c91e683

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