Malicious PDF — malware analysis report

Static analysis result for SHA-256 2205269302ab9fd1…

MALICIOUS

PDF

67.6 KB Created: 2021-02-28 01:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 01b4e361af1f13b3f83a0440d0c518ee SHA-1: 22ced699ff800c73456d8a4ab122604376d607da SHA-256: 2205269302ab9fd17b808bef9a2550c96dc49a3e99724c1924cb747013dc1911
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=water+normal+maps PDF link annotation
    • https://cdn.sqhk.co/reretukida/gjig7fF/81061516880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_6033fe642e8f6.pdfIn PDF document text
    • https://cdn.sqhk.co/mevojazix/ib14s9H/halloween_costumes_brooklyn_and_bailey.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/TjeJjul/lozasamut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_602b4942bf4f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482638/normal_5fffbb0e826b1.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/zafetoguwarumanirub.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/xgiiiuk/camouflage_skins_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fd957c6bd6e6.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/53879119560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_6002092eed1a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368489/normal_5fcb478b26e59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nabenejajoko.myartsonline.com/how_do_i_program_a_comcast_remote_control.pdfIn PDF document text
    • http://fidegaf.atwebpages.com/nifekeg.pdfIn PDF document text
    • http://tugupora.epizy.com/luduzudumoxudegizisamoxu.pdfIn PDF document text
    • http://wasuwenakab.epizy.com/stop_kiss_monologue.pdfIn PDF document text
    • http://wifudozakiteg.epizy.com/persuasive_writing_graphic_organizer_5th_grade.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/bilitovomowaju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14C 4716 bytes
SHA-256: 4d76b82b4925103ad01b2a94b383b4cd79e7621a3fed1878290b7274a48b31b2
font_01_sfnt_off0000d136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD136 9896 bytes
SHA-256: bb54fe81f480f27e580d91cad54149ca43ba1be20d048ddbfd8e3ac145f08046
font_02_sfnt_off0000f30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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