Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff62fd37bee2025…

MALICIOUS

PDF

70.0 KB Created: 2021-03-31 01:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2d11feffa51cf408858a100650bba9e1 SHA-1: 4d07c46a27f0d8e9ed0454dd14ef45e788b1b8df SHA-256: eff62fd37bee2025b393eaee5b94db20a51c3c30825ccd93b80c6fb2374b0a1a
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to numerous external websites, likely for phishing or malware distribution. The embedded URLs and the PDF's structure suggest an attempt to disguise malicious content as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=attached+amir+levine+free+pdf PDF link annotation
    • https://negowisavu.weebly.com/uploads/1/3/1/4/131406226/875650.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/what_does_zen_habits_mean.pdfIn PDF document text
    • http://autocredit.moscow/philips_multigroom_series_3000_vs_7000xez5u.pdfIn PDF document text
    • http://devlp.club/61057931069f45hu.pdfIn PDF document text
    • https://xalekosud.weebly.com/uploads/1/3/5/3/135350534/binebumujokalen.pdfIn PDF document text
    • http://leftoutclub.com/the_coldest_place_on_earth_tim_vicary_questions1lg8v.pdfIn PDF document text
    • http://meinekarten.best/pirukivorilipimomanu68e8.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/4659832.pdfIn PDF document text
    • http://bottlechainworld.com/moonlighter_weapon_guidez9knc.pdfIn PDF document text
    • http://francobusiness.com/dirozewusolijagenumibanxlc5g.pdfIn PDF document text
    • http://xademubizu.sportsontheweb.net/kakesutok.pdfIn PDF document text
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/2775708.pdfIn PDF document text
    • http://siteznakomstv69.space/xewove8r4ga.pdfIn PDF document text
    • http://br1.red/tuwezok9wza.pdfIn PDF document text
    • http://rawenspant.online/82763468032lslor.pdfIn PDF document text
    • http://tiktoktop.design/how_to_start_an_electronics_companyd71oe.pdfIn PDF document text
    • https://munopufunorari.weebly.com/uploads/1/3/4/8/134881547/2006710.pdfIn PDF document text
    • http://topfrag.rip/arctic_fox_animal_informationvlnnw.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/97125469196.pdfIn PDF document text
    • http://baltika-trans.ru/what_causes_burning_rash_on_legsbtrif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesugipove.onlinewebshop.net/sokepepulotipowexunaxew.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/85129019499.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_off0000d6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 5268 bytes
SHA-256: d8651b6e9e29f26ebeab569d3c7cdeba4b187a375ea7b2ea21422d0af656e29e
font_01_sfnt_off0000e89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89C 10016 bytes
SHA-256: 215f03db70d054c60fe32e22b041aeef2e67ef0c6ab0f28890efb0af70ffe95f

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