Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f76f73f095fad1…

MALICIOUS

PDF

81.7 KB Created: 2021-04-01 10:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e8e6412113697ff1b78dfee6072d192f SHA-1: f25e71e22d924d5dfb729ee06934937937fbb58e SHA-256: 04f76f73f095fad101abe9aea18b550ed7bf446da6ec8e53f46b6fb0226dbb3d
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URL pointing to 'xajibur.ru', which is flagged as unknown reputation. ClamAV also detected this as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to search queries. The presence of external links and the ML classifier output strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xajibur.ru/strik?utm_term=what+is+the+best+adjustable+bed+base+on+the+market PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/47281750158.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/59234076326.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/interview_questions_to_ask_candidates_about_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e22b4a-a27c-4df7-af2d-c53a1fa7a644/metupu.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_f4833a6be6a44ac29a82d45ea5ba7645.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legesiliv/medicare_guidelines_for_hospice_dementia.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/8514659648.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/juzagamikivekagadi.pdfIn PDF document text
    • http://foduwisidowej.rf.gd/physical_asset_management.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/81383236862.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/sibivabuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/21340308105.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/kutifakikozuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa3717d-ffe9-4f61-9433-ce3a7a5d33fa/maytag_bravos_mct_dryer_blower_belt_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/is_the_game_show_the_chase_still_on_the_air.pdfIn PDF document text
    • http://xiriranur.epizy.com/20710401042.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/australia_tourist_visa_online_form.pdfIn PDF document text
    • http://jafajikizogid.epizy.com/66814719239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe411cf-0647-4f17-8034-b669115d3124/zejimomenenamifukuki.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/37639916839.pdfIn PDF document text
    • https://300a1258-3b13-45f7-80b9-bd8966f45320.filesusr.com/ugd/81888a_0d0045a305764990997e7ed57012fd3d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 5360 bytes
SHA-256: cdfb8b84b36e8420fe3e3933cbf50cba7a9feaf022c5d9280388761eb38fa412
font_01_sfnt_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 10708 bytes
SHA-256: f9d9b8d50df98fa57c602a35d8ab903ec8476ffc0ce63e0a6ac893c82b5fc55a
font_02_sfnt_off000123e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E6 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

Open this report in the interactive analyzer, or submit your own file for analysis.