Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80068978f8b2461…

MALICIOUS

PDF

77.5 KB Created: 2021-04-03 12:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d2c64fc890b8b57864401a94851b5b3d SHA-1: 286294ded71b746500277d5478aa59b3fc7a2734 SHA-256: d80068978f8b246112f61c6e64f1508ebd195633d418531982649ac137b609ec
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier also strongly indicate maliciousness, specifically classifying it as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the presence of numerous external URLs, including suspicious domains like 'nipisod.ru' and 'bagugexasorip.myartsonline.com', points towards a phishing or malicious redirection attack.

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 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://nipisod.ru/123?utm_term=biore+cleansing+oil+sheet PDF link annotation
    • http://xidasetetobuge.scienceontheweb.net/thermador_wine_refrigerators.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461773/normal_5fe122f81e59d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_6016fa4c9fce6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405662/normal_5ffbcb1b11e9e.pdfIn PDF document text
    • http://podcard2020.site/after_anna_todd_netflix_francefk1fs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414871/normal_5fe4a63db99f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470014/normal_602eedd1280fc.pdfIn PDF document text
    • http://siteznakomstv69.space/83231471117qi4pw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458839/normal_5fca5175540ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501961/normal_5ff664fb5f243.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bagugexasorip.myartsonline.com/harry_potter_and_the_half-blood_prince_2009_trailer.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_99900efd905b4fb58f8538743c33de8e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jotizifime/87300193080.pdfIn PDF document text
    • http://sagoralezerelo.onlinewebshop.net/how_to_cook_gammon_in_slow_cooker_with_coke.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/22319302365.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/tokyo_ghoul_season_3_kaneki_returns.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/gidonubarefewenubamali.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_846beb1ac6b246168d1c1b26df8bf2a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gebukil/quadratic_form_associated_bilinear_form.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_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 5108 bytes
SHA-256: 660eee06af0ac231bcef11ee59fdc4b30419431d9863add241923875da144f4c
font_01_sfnt_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 11372 bytes
SHA-256: 8478077501af9e131a5d025743cfffe26febf9d73c64a8d5fb5b7fbc7d95b802

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