Malicious PDF — malware analysis report

Static analysis result for SHA-256 387cc0c4856c2270…

MALICIOUS

PDF

78.0 KB Created: 2021-03-26 14:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d1ab6af6a203703cdfd729886918d930 SHA-1: 124b3fa323fcc059906a1b27e741dfaba0544791 SHA-256: 387cc0c4856c2270f30243b4ebfb1a75e7d400f2bec6300fd0aabcc4a1d6419a
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 0.9990

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://mezovuduw.ru/123?utm_term=dynamics+nav+2018+cu3 PDF link annotation
    • http://goldalbum.ru/transmission_line_and_its_types_pptjfb9f.pdfIn PDF document text
    • http://nat-fru.space/best_quran_tafseer_book_in_englishnvn0v.pdfIn PDF document text
    • http://cleaner-inn.club/potevazoxujajivumulifofawktz3p.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/biogas_kotoran_ayam.pdfIn PDF document text
    • http://popularchoice.space/finugon7ukdj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376619/normal_5fecb3a41bc4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444638/normal_5fe40b04592bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_6039ca78c466f.pdfIn PDF document text
    • http://adanakebap.org/pegeva6wqz9.pdfIn PDF document text
    • http://acupofjacob.com/xukukapigilomerivajiodj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375083/normal_5ffa1571a82d2.pdfIn PDF document text
    • http://webdefilmizle.com/ruvunujorezuz9w1d8.pdfIn PDF document text
    • http://helper-badges.com/snow_white_with_the_red_hair_episode_2_facebook20k62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409606/normal_5fe5ec6d8db2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fopalew/noworusomovebuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfe07c0-2712-4509-94cf-b6c3075f390b/presto_cooker_canner_7b.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/26576438498.pdfIn PDF document text
    • http://bupalim.atwebpages.com/14992846665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2a605b2-be19-441c-b9de-0ff19ab02772/72894478970.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/anjali_geethanjali_kannada_film_songs.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/causas_de_la_caida_del_muro_de_berlin.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/how_to_set_rogue_clock.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/bivageloxopovuxinafow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83398a9b-2812-43d9-b66f-0835c99fbcf6/17305905993.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 5236 bytes
SHA-256: f629608eeff5100119a1864441d947a665a52110e374173b24c657640ccfdd62
font_01_sfnt_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 10280 bytes
SHA-256: 5c4687e9c03f577bcf9569b4ce3ea1c6c19e26e93333bfa21449a2ead87550c4
font_02_sfnt_off00011ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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