Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36019997cd558da…

MALICIOUS

PDF

66.2 KB Created: 2021-03-01 08:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6f5ed9b63976571d0a62a283b5b8b248 SHA-1: 530f27ccca2be33b069d4ddc0ff7796563c77c19 SHA-256: e36019997cd558da78e810b89a0f8051bf6ea34451d925f0e99c8b3a708df3ba
126 Risk Score

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=crime+patrol+10+july+2015 PDF link annotation
    • https://cdn.sqhk.co/gedugari/N7jbqAB/99465474374.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/jYWjau5/9172824219.pdfIn PDF document text
    • https://cdn.sqhk.co/salasereki/JgfnhhW/ffx_2_fiend_arena_guide.pdfIn PDF document text
    • http://jetolad.iblogger.org/41586030535.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/dL0JUgf/business_tourism_degree.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/himWjjd/80s_tamil_sad_songs_list.pdfIn PDF document text
    • http://gramnews.xyz/zorofijupalunuwavfsi.pdfIn PDF document text
    • http://goldstein.berlin/sunabikudabavirunazo62iz6.pdfIn PDF document text
    • https://cdn.sqhk.co/disanefamu/7ggtDwh/35785366444.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/hhBMojj/2428983144.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/jldKfgh/71722002359.pdfIn PDF document text
    • http://casbah2point0.com/xoxuwadeduguxijopxso.pdfIn PDF document text
    • http://zarozunaxa.iblogger.org/46463592440.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/ghjeigi/pixel_unknown_battleground_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/junikesiza/bMZriz4/hashtag_generator_for_photography.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pubamawuxa.epizy.com/carplay_android_auto_aftermarket.pdfIn PDF document text
    • http://dodagedopijon.epizy.com/490200597.pdfIn PDF document text
    • http://jimanujomubil.epizy.com/data_analysis_methods.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_off0000c690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC690 5320 bytes
SHA-256: 45855468c9671b1ce77994027b06b6146e9dcd6df99afa9a58fded5d99ec399f
font_01_sfnt_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 10404 bytes
SHA-256: 2e93fc244176d9321fcfd07ce53537ad3bddd8ab0dce92edb5df7261797d1963

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