Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faa2e5e9edc754c…

MALICIOUS

PDF

223.7 KB Created: 2021-05-11 06:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 403a6ec6b2e0c0008428bb1a76ef82c3 SHA-1: 4af2a4d1ca072dadbb7a8bdcc0089ef5d0010ea0 SHA-256: 0faa2e5e9edc754c1aac8d5c68dd18082ac643fe9d012ae347ffd87b9e1f687e
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL and the PDF structure suggest an intent to exploit the user through redirection, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://crophysi.ru/strik?utm_term=is+game+of+thrones+suitable+for+a+14+year+old In PDF document text
    • https://cdn.sqhk.co/nisugavu/jhLhdjj/78157449655.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/iRXdBgh/free_r_b_hip_hop_radio_stations_nashville.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_606c652ee8261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_6045e5b608e9a.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/iijjogj/android_os_for_pc_amd_processor.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/UIeLKjc/83239499116.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/igibPMU/guess_the_word_with_pictures_game.pdfIn PDF document text
    • https://fubaxegadajud.weebly.com/uploads/1/3/4/4/134454669/6190547.pdfIn PDF document text
    • https://tefeteti.weebly.com/uploads/1/3/0/9/130969297/zamew.pdfIn PDF document text
    • https://cdn.sqhk.co/dunenilufa/egdgdhd/94645365184.pdfIn PDF document text
    • https://sewiwojura.weebly.com/uploads/1/3/4/3/134371681/siserefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_606106756cfbe.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/Gib2pR4/dumisekosa.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/A4hbOUU/jujuvego.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/d0Zgeim/jewels_switch_mod_apk.pdfIn PDF document text
    • https://gagavupotiwek.weebly.com/uploads/1/3/0/8/130813998/logarewosolusema.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/65414558009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoxobopowipido.epizy.com/catalog_ball_bearing_skf.pdfIn PDF document text
    • http://kozusabupo.epizy.com/30227092620.pdfIn PDF document text
    • http://gisudaledusuroz.rf.gd/insomnia_cookies_menu.pdfIn PDF document text
    • http://nadedeve.rf.gd/63055367129.pdfIn PDF document text
    • http://fedatowuka.epizy.com/anencefalia_tratamiento.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/15146042289.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_off00033092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33092 5640 bytes
SHA-256: f41fcdd98c6338bfd4bf31ba03cc17297a9d9f413eb0f43cc7e040a75f8dc1f7
font_01_sfnt_off000343aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x343AA 14672 bytes
SHA-256: 97cff519d1e6c1145453353bd113e0e7c35b96ea369a41aad77978be03507287

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