Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70e017a8184d6fe…

MALICIOUS

PDF

76.3 KB Created: 2021-03-17 13:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 19dba5e28b5344c469fec25984df62c1 SHA-1: 99ae941a64bf57a1a616789db6ad9642fa438e1d SHA-256: f70e017a8184d6fef60463d95d975d3163096ccc199b06fbc2a89ca9a4818e80
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 0.9756

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://xezojetit.ru/award?keyword=liturgical+year+dom+gueranger+pdf PDF link annotation
    • http://blognews.top/66152521766t89xv.pdfIn PDF document text
    • http://kigajekuterol.iblogger.org/zaratisulijar.pdfIn PDF document text
    • http://hisgohar.site/ateten_gmlek_roman_tahlilin4nvo.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/5037587.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/biluwakebokadot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_60147f6d3e593.pdfIn PDF document text
    • http://zafuwozemupojaw.22web.org/initial_velocity_and_final_velocity_formula.pdfIn PDF document text
    • http://mir23.xyz/tissot_watches_t_touch_set_timeudxfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473618/normal_5feb71bbe7a59.pdfIn PDF document text
    • http://krokoboko3.xyz/vusikise9h6wt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417308/normal_600446c7b71f7.pdfIn PDF document text
    • https://tiseworadew.weebly.com/uploads/1/3/5/3/135317060/pitofegepe.pdfIn PDF document text
    • http://golden-charm.ru/crazy_kind_of_love_movie_reviewoq7vx.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/polarity_test_of_3_phase_induction_motor.pdfIn PDF document text
    • http://organize.shop/87046975612g293m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekelaxowe.atwebpages.com/85970306891.pdfIn PDF document text
    • http://lezipador.epizy.com/hernia_inguinal_recem_nascido.pdfIn PDF document text
    • http://togetaru.epizy.com/95515486068.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/23785860853.pdfIn 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_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 5340 bytes
SHA-256: 92cb634a3751d7c1501d6f42785728c9bf47ce6a9d22dfb4c78e7b32f141e320
font_01_sfnt_off00010537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10537 11440 bytes
SHA-256: a890164d58b93f1f0297bcea201d77e3806e112ea04e2bf87918fd33a7d3ffab

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