Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d795156b68a91b…

MALICIOUS

PDF

89.1 KB Created: 2021-04-04 20:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e69893754b1b6e908a216a87db7f4241 SHA-1: dfdcbbe3968ea527fdd99b190b14f32f0df08aed SHA-256: 75d795156b68a91be4c5a591696bfbd70faad8c0083d7a31e3fde20b05c44b20
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('bologen.ru' and 'mangalvpodarok.ru'), suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to its creation, and the presence of embedded URLs strongly indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://bologen.ru/strik?utm_term=direct+object+pronouns+french+rules PDF link annotation
    • http://mangalvpodarok.ru/58412468324hdsyn.pdfIn PDF document text
    • http://barojenixumaja.iblogger.org/sewisitesegumado.pdfIn PDF document text
    • http://buloshnaya.site/dowafigoxeguvesefesixus8dux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387811/normal_5fede011a2fb7.pdfIn PDF document text
    • http://tesapewuj.22web.org/faces_edges_vertices_of_3d_shapes_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468812/normal_604f51e68912a.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/nitatotol/batman_game_free_for_android_apk.pdfIn PDF document text
    • http://sizokipizap.rf.gd/62237761824.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_2b56489fc83b4887b12efccb3fc907b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d8c3f61-0616-4d23-b5d7-aaf8d6918791/97410320289.pdfIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_0095a260c2654aff86bc4e7cc77cec17.pdf?index=trueIn PDF document text
    • http://fakatidewejuna.epizy.com/nigeria_cashless_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/mammoth_slayer_guide_osrs.pdfIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_95a04bd14fd74fac847307e3fd359f63.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefdd368-f83a-4abd-b406-8defaaff6499/xelexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cac8055-147f-4d8a-b3b8-d0ba8dd7b17b/39053045428.pdfIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_a17422875aba4d14b77408ebe4e72d19.pdf?index=trueIn PDF document text
    • http://lezipador.epizy.com/hernia_inguinal_recem_nascido.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_off00011d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D61 5108 bytes
SHA-256: 9dab7d2cda960a112899f7bddcdb96b2e46eb1724c5e7c54da42e26598b7451b
font_01_sfnt_off00012ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC7 12548 bytes
SHA-256: 053695b724b9e337f5052829ff9ccd4e5b576c727432118c02f7501e54755832

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