Malicious PDF — malware analysis report

Static analysis result for SHA-256 d172af305b361f7a…

MALICIOUS

PDF

76.1 KB Created: 2021-03-08 18:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40c378ae3672d14af184b703efe3ec76 SHA-1: d4036c60f1db0fe3fdeedef35b2ee85a2b95dd9f SHA-256: d172af305b361f7a9bde8726932c4891eb7a1a5b331aa1c8b0d4f35d9d7ad83f
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, https://jottigo.ru/award?keyword=anemia+hemolitica+ni%25C3%25B1os+pdf, is flagged as suspicious and likely leads to a phishing or malware distribution site. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection further support the malicious classification. The document body, though heavily garbled, contains text related to the suspicious URL, suggesting a lure to a fake informational page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jottigo.ru/award?keyword=anemia+hemolitica+ni%25C3%25B1os+pdf PDF link annotation
    • http://moitender.org/23346260067podol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446645/normal_5fc795064c13c.pdfIn PDF document text
    • http://shopbest.online/lapetofukemexokegaliwemp0372.pdfIn PDF document text
    • http://kmplitka.shop/448774657386rmv4.pdfIn PDF document text
    • http://gnfcns.info/death_note_movie_2020b7tqj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472216/normal_601e29768e191.pdfIn PDF document text
    • http://skameyki.club/piparuwikbq8ps.pdfIn PDF document text
    • http://balonedud.iblogger.org/juki_sewing_machine_parts_book.pdfIn PDF document text
    • http://rawenspant.online/118888122097kueb.pdfIn PDF document text
    • http://repositorio.pediatria.gob.mx:8180/handle/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_29455f44c9984d96831be4e17b851817.pdf?index=trueIn PDF document text
    • http://takugiwem.rf.gd/arte_de_la_guerra_sun_tzu_resumen_por_capitulos.pdfIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_3f28227b480d4109961a23daa7a2bbf6.pdf?index=trueIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_cefc272198eb4314a6fd2c7876d57ba0.pdf?index=trueIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_45c44f8a3f7f44f6a429423c13111d0d.pdf?index=trueIn PDF document text
    • http://vugurajuv.epizy.com/95325035877.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_4ef7753c5f9d4a71b7a85f37a0d712fd.pdf?index=trueIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_cf645bf5f6434cd5947ef86b52ddf1fd.pdf?index=trueIn 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_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 5500 bytes
SHA-256: 55689c9a7479deea7972277b50db437e9d7c0fe4ae28db19fbaf38a2affba4aa
font_01_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 10928 bytes
SHA-256: a70dc5939afbfecd289b4973a89d2657bf2c7a9f789654d1c8bdf81b2e0779f7

Open this report in the interactive analyzer, or submit your own file for analysis.