Malicious PDF — malware analysis report

Static analysis result for SHA-256 321ce9199878da80…

MALICIOUS

PDF

72.7 KB Created: 2021-02-14 06:38:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ebd86b446d40c71f6ff415715101b339 SHA-1: 1a8dccb99df3772ab95defb43dbc9efe0f35e230 SHA-256: 321ce9199878da80e40d25803cda532523d0a4d4fcbeefcbb727ac8527e78753
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=hp+aio+remote+apk', which is likely a lure for downloading malware. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URL suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=hp+aio+remote+apk In PDF document text
    • https://cdn.sqhk.co/remezebona/cZkykgf/the_game_of_life_rules_2005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5ff0eb01496a5.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/iifggjh/giant_panda_takes_bubble_bath.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezima/jijfhjH/order_color_contacts_online_with_insurance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5fca12d0a7985.pdfIn PDF document text
    • http://tejajugumoneton.66ghz.com/binomische_formeln_ausmultiplizieren.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Libh9cC/wedirafiradulejiruweb.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/giQgg9J/vosorubusu.pdfIn PDF document text
    • http://virubedasiv.22web.org/lagu_hanya_rindu_tival_salsabila.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/habE9b5/topuzapapagorijalalos.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/vigevot/garizowusaj.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/flow_sheet_diagram_for_manufacture_of_urea.pdfIn PDF document text
    • http://nipuwiwabo.rf.gd/stunt_bike_freestyle_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/baal_veer_video_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/sufirubezeguravovewexem.pdfIn PDF document text
    • http://xodubepegiluli.rf.gd/93773568622.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/fezogakexu.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_off0000e250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 4780 bytes
SHA-256: 374439342a60e249a30ab020f58f5db203adfb025544f4afd7899b753d3d0a85
font_01_sfnt_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 10304 bytes
SHA-256: 547c5e774a6b12d48bb57793cad6fc7f0e58081aede67da5c85f312f72f92f11

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