Malicious PDF — malware analysis report

Static analysis result for SHA-256 9118f97c939bc891…

MALICIOUS

PDF

107.6 KB Created: 2021-05-02 14:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c94d1a8bae057a9f19c1c97e4f081183 SHA-1: 90c9cfc108a8671407bb2a65012c4dc1fd724b29 SHA-256: 9118f97c939bc891fdc16db1d14e6e2616f2a9674942b9b2ef6afdb24f9c7bcc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://soxebez.ru/strik?utm_term=process+analysis+essay+examples+pdf PDF link annotation
    • http://digosige.mywebcommunity.org/munatunetejipoxared.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/sudulogatabewex.pdfIn PDF document text
    • http://teren.fun/what_does_the_tenth_mean_in_hebrewnne07.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/audio_driver_for_windows_10_64-bit_-_lenovo_g580.pdfIn PDF document text
    • http://bosuloridulumo.22web.org/66989701992.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/xonetububuvasaliriwinotum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487432/normal_6026a4bc1efc9.pdfIn PDF document text
    • http://nubilofanekib.mygamesonline.org/laxivotatepex.pdfIn PDF document text
    • http://fit-italy.space/vishnu_sahasranama_meaning_in_english_download7j5a4.pdfIn PDF document text
    • http://fofifokese.iblogger.org/54377052849.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381108/normal_5fe04333ed318.pdfIn PDF document text
    • http://helen-art.ru/47669811432pmt67.pdfIn PDF document text
    • http://study-english-05.site/darogelurivamegizg6gyv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446496/normal_606c9ce50f6c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468843/normal_6010352f1ff87.pdfIn PDF document text
    • http://lnstagramcentre.net/best_brick_rocket_stove_designbu5aw.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/48497060363.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/arquimedes_biografia.pdfIn PDF document text
    • http://xasagode.myartsonline.com/autocad_civil_3d_2020_manual.pdfIn PDF document text
    • http://wapemufabaloni.rf.gd/skoda_yeti_2020_brochure.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/47292525230.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_off000168d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168D4 5472 bytes
SHA-256: 9a4ad7edeef1d0ca150818a18d89ee747cd4396bebbede144e270f990e68b925
font_01_sfnt_off00017b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B6B 11104 bytes
SHA-256: 8b48d40c7421ec8dd0661d20a5c41e70ad322650b9203bccc2d38f7abca8ba4f

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