Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a8cecb42bce3d0…

MALICIOUS

PDF

69.9 KB Created: 2021-02-17 06:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 98df40af8361665d7cec059d53f42823 SHA-1: edafdb546ea8b5a300e629df926cf36359e94f9a SHA-256: e1a8cecb42bce3d0ccc778622a7529b2f6f2a9b5b239954846f70cdde68e01fb
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 0.9997

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://druttle.ru/strik?utm_term=bradford+white+defender+40+gal+water+heater+price PDF link annotation
    • http://kinokaiff.space/25831368230pv40a.pdfIn PDF document text
    • http://umniashka.ru/29711060347n72g1.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/fo9tYhf/motorcycles_for_sale_by_owner_memphis_tn.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/uiijbha/dogs_stolen_for_dog_fighting_bait_uk.pdfIn PDF document text
    • http://verifedform.com/homophones_worksheets_for_grade_4howbw.pdfIn PDF document text
    • http://preplafond.xyz/ireland_capital_gains_tax_formlm7v2.pdfIn PDF document text
    • http://reduslim-shopufficiale.site/hat_in_time_speedrun_guideosptl.pdfIn PDF document text
    • http://termometr-medikal.site/rirakiriporivaxs3h96.pdfIn PDF document text
    • http://todayshop.website/blank_calendar_templatew2qq4.pdfIn PDF document text
    • http://lalat.space/tofemuxmwl2k.pdfIn PDF document text
    • http://goloszauniver.fun/top_ten_funniest_clean_youtube_videosw8zf8.pdfIn PDF document text
    • http://whitecheat.xyz/anisio_teixeira_livros0trj8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karifopiti.epizy.com/zumova.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/80676496538.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_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 5612 bytes
SHA-256: 811a123fa5455142c0a304a2b50cf6ac656183445d53407b4366969098235519
font_01_sfnt_off0000e613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE613 10656 bytes
SHA-256: bc1812d40471a9cd57576a85a63a53137d3bd3374d0e6fe296cdc19387611d69

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