Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f09a35d5c7d6548…

MALICIOUS

PDF

65.8 KB Created: 2021-02-17 15:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 24785c6b3e93abae9d952dfc72f1ce00 SHA-1: 5a90e76545f3e0983ef74fb72db87e39a0831364 SHA-256: 6f09a35d5c7d6548d126f29cf77e40cc5b857550e5b9572c5025f62fab295a2e
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary one being `https://jottigo.ru/wix?keyword=glacier+bay+toilet+340+995+manual`, presented as a manual to deceive users. The document body is heavily obfuscated, but the presence of external links and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malicious redirection attempt.

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://jottigo.ru/wix?keyword=glacier+bay+toilet+340+995+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415331/normal_6027179679d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_600de61103992.pdfIn PDF document text
    • https://puluzoxaxidu.weebly.com/uploads/1/3/2/6/132683087/puzofaravixiw_fuxaligagafurob_gedivige_manulamavofew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_602220dbe79bd.pdfIn PDF document text
    • https://juwujumatel.weebly.com/uploads/1/3/4/0/134042908/giruretepuzijuzala.pdfIn PDF document text
    • http://pihodze.com/business_model_generation_englishy56et.pdfIn PDF document text
    • http://rilotelexewobos.iblogger.org/inter_1st_year_ict_book.pdfIn PDF document text
    • http://dutebolidetol.iblogger.org/kisubar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5ff52d5fcd6b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5ff52a3f1dffc.pdfIn PDF document text
    • http://kesawalaxok.iblogger.org/junuxixeli.pdfIn PDF document text
    • http://reactivascotia2020.com/dragon_block_c_recipes2757c.pdfIn PDF document text
    • https://kinajerabisar.weebly.com/uploads/1/3/4/7/134748515/voxene-nomesilarusevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buxebawimiro.epizy.com/87311709608.pdfIn PDF document text
    • http://wotixebapaxuwug.rf.gd/a_dozen_a_day_book_1.pdfIn PDF document text
    • http://fixorafusadaxuk.rf.gd/dozevefuboxamekexusop.pdfIn PDF document text
    • http://nunozufivov.epizy.com/21184438119.pdfIn PDF document text
    • http://zoxutuperovizo.epizy.com/xosonejosolefub.pdfIn PDF document text
    • http://kijaripejugap.epizy.com/ny_police_report_insurance_code_639.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_off0000bdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF4 5716 bytes
SHA-256: e32983d10a56c4e8c81f704985f5c41f56ca3384127aa06c49459f35a47c3c4d
font_01_sfnt_off0000d16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16A 12612 bytes
SHA-256: dd4b1cdcf89033967e3b3fea36cd776afcfc5faa97975dd59bcc79f1321ed985

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