Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f4a0b502ad736b…

MALICIOUS

PDF

78.0 KB Created: 2021-03-23 07:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d8116ea5b0ce41bc9c5d8a110989eeb SHA-1: 41322a4645d5048d527c48248709847aee9954a8 SHA-256: d1f4a0b502ad736b87a93f058cb48bdf2f45e0f43d3dd621aa21e2349cf44882
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt, with one URL directly referencing a 'Nissan Pathfinder DVD player manual' to lure victims. The presence of embedded URLs and the PDF structure strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=2014+nissan+pathfinder+dvd+player+manual
    • https://cdn.sqhk.co/bisegepamitu/RijggFF/ponerse_past_perfect_tense.pdf
    • https://vupixesit.weebly.com/uploads/1/3/2/7/132740805/fujoxozolalob.pdf
    • https://cdn.sqhk.co/bomaguvodar/mUzghi9/action_verbs_worksheet_3rd_grade.pdf
    • https://cdn.sqhk.co/gidufulelav/a912Bgh/the_adventures_of_tintin_trailer_1.pdf
    • https://cdn.sqhk.co/xovepejegosi/gjjiJhe/19715460714.pdf
    • https://nonupipo.weebly.com/uploads/1/3/4/7/134767860/tesedogufefulagi.pdf
    • https://cdn.sqhk.co/nolagutotato/iOij64K/32726088043.pdf
    • https://cdn.sqhk.co/ruwopazeg/idaijhf/flights_to_hawaii_from_houston_june_2020.pdf
    • https://cdn.sqhk.co/tinipuded/1tTLzoa/kozaxupofo.pdf
    • https://cdn.sqhk.co/zimopiroxab/jbjfmWx/kunosejefodujonig.pdf
    • https://cdn.sqhk.co/letarezetap/CtjdgtM/fast_money_halftime_report_cnbc_fix.pdf
    • https://cdn.sqhk.co/bulegumu/fvWhehj/begikakijal.pdf
    • https://cdn.sqhk.co/sawijewabob/fggihDy/best_mobile_ringtones_top_100_songs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_9a4e529ab9c3471bb01e154b1714e38e.pdf?index=true
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_a908e2727d0b49e282f50803cca4394e.pdf?index=true
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_a4ab3d895c844e80baaae7a96df125d0.pdf?index=true
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_0d6b883f4101415a8034e1afe162c04b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f070.bin
fd0b68418709273385d1c7fa9692cde2e1b14e4b1e3dcd6952f8662fcc670126		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 5764 bytes
font_01_sfnt_off000103f8.bin
d2301bebf111fe379ac389e3b4ff8423f5343f525c0f911435abfef731c41d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 10960 bytes

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