Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a498fe979a99b03…

MALICIOUS

PDF

70.1 KB Created: 2021-03-15 20:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60675520320b44a1adb1e70362beb41d SHA-1: a82a22851e5dfda93ee67d9e93f68eed088687c1 SHA-256: 7a498fe979a99b03b7136c991a8b8e4df2dc4da03d2f9f42ec05b1cdce3ae5fd
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 0.9998

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://jumiwimov.ru/strik?utm_term=hp+p3015+toner+staples PDF link annotation
    • http://coolstudent.space/89977704414yrpya.pdfIn PDF document text
    • http://nature-ital.space/program_xfinity_remote_to_tv_no_setup_buttoncyytk.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/QhfhcJg/free_local_police_scanner_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409113/normal_5fe44f98211bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_601dbd9388fc4.pdfIn PDF document text
    • http://spainsale.pro/gao_veobecn_a_anorganick_chmiaugyu7.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/meeting_cancelled_due_to_lack_of_quorum_meaningxyh70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_600c0370404b4.pdfIn PDF document text
    • http://trikotoria.ru/transition_to_advanced_mathematics_8th_editiond2asn.pdfIn PDF document text
    • http://respect-ltd.su/39152623041yfrlc.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/bjfMjaB/best_offer_to_buy_cary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_5fdb8a895b445.pdfIn PDF document text
    • http://rubka.space/467330795681u753.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_532bd643b5244f7293942d75a4a5db5b.pdf?index=trueIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_f77f4217b5ae4e7b81f599b79a2ef620.pdf?index=trueIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_98b3faea2f2847d48fc74bdcbd648053.pdf?index=trueIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_334f4659bfff4f16af2a352dfc0222e7.pdf?index=trueIn 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_off0000ccae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAE 5256 bytes
SHA-256: 7be41152a967a42711a55cccf2610c5f432be96cf58218cf29fb73c217575449
font_01_sfnt_off0000dea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA4 15480 bytes
SHA-256: c2408039b9b30e75bb93c5290a8e241dfd5072c707678319ff8cae3369945475

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