Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e00b974f143a55…

MALICIOUS

PDF

83.5 KB Created: 2021-03-25 02:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a6cfc97423c28c478aa9e12699500c21 SHA-1: 1f3144802c6d627bd352d2879dbffc566c695bba SHA-256: 98e00b974f143a55ae03424f5f291a026be4560281cb7bc8af5cb0f7647e5156
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to suspicious domains, including one that appears to be a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=ages+and+stages+questionnaire+pdf+2+month PDF link annotation
    • http://favuloxodi.iblogger.org/vinajeparalagibinareb.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/16456032859.pdfIn PDF document text
    • http://edayafar.xyz/folder_colorizer_1._4._68cmtu.pdfIn PDF document text
    • http://snail-case.store/how_to_reset_a_smart_plugxu1ac.pdfIn PDF document text
    • http://telgrm.site/metozulefidibbvwzu.pdfIn PDF document text
    • http://segwaywheelchair.ru/fujejubaromolama3sw2x.pdfIn PDF document text
    • http://blog-uniswap.org/tovujepexazvtefo.pdfIn PDF document text
    • http://sallehub.xyz/meganthi_circus_mp4_video_songsbazig.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/vubaxiwasobiliwemoni.pdfIn PDF document text
    • http://triple-doska6.club/gowili1xrui.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/vuforewebub/2015_malayalam_movies_in_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f69548e7-803e-4924-844a-4eceeda34c75/nike_air_force_1_white_mens_11.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/chicco_keyfit_30_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4452f262-712a-41de-8851-1943d616483b/answers_adams_calculus_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/karate_black_belt_certificate_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef372c89-9dfa-4db6-af7a-107141cf3d61/ruxovagubujinufowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3af6682-b81c-4aca-b973-cc6ee092593c/c_programming_language_bangla.pdfIn PDF document text
    • http://gimudujukuweg.rf.gd/lenebojemuvof.pdfIn PDF document text
    • http://pisizupulexus.rf.gd/libro_broto_instrumentacion_quirurgica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25849451-ce43-4709-8d28-34e062ba9092/samezulezut.pdfIn PDF document text
    • http://ganusigesu.rf.gd/2692968738.pdfIn PDF document text
    • http://vokoribosid.rf.gd/botim_video_call_app.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_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 5668 bytes
SHA-256: 6761f499d8d6609a75faafac6e5b46f772ef825614fe39c0957dac9321f69578
font_01_sfnt_off00011417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11417 12792 bytes
SHA-256: a51f350963dfbcde25eca669fd81374fdccf7d3a126b1cde53a8253cee8074dd

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