Malicious PDF — malware analysis report

Static analysis result for SHA-256 591220f1a001f23a…

MALICIOUS

PDF

79.2 KB Created: 2021-04-15 15:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9121242abd9f8bad5dbd7a654d9321cf SHA-1: 57d59f5aeb6ad5abe2b86858d5667ad0664e078d SHA-256: 591220f1a001f23acf46119f778042b52c8e15acd94882ff7fd6a26ad638e6db
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/strik?utm_term=6+week+training+program+example PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388620/normal_60060919424f9.pdfIn PDF document text
    • https://cdn.sqhk.co/xedasuzefer/uhflzZo/jusosuzuxewoged.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/ay3a8gh/robo_legacy_strange_robot_war_battleground_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/pUgFqwS/jumaseperesajegigevanuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_606024a573dc3.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/ghug4WM/hearts_of_palm_ceviche_tostadas.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/ehbijWp/epic_games_current_stock_price.pdfIn PDF document text
    • http://nireviwolaz.22web.org/a_political_economy_of_american_hegemony.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/bhojpuri_movie_video_2013.pdfIn PDF document text
    • http://soxixebupi.rf.gd/benzyl_formate_nmr.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_6e044562f05d4736b64c23f8d7d52280.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokamoba/murokid.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_eb72d08d4e194299ad2fa185be268b5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/xewevawizaliwalo.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/printable_burger_king_coupons_2021.pdfIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_1d5a0f6565ea453bb8eab6da9a93ea0f.pdf?index=trueIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_577a6cafee33402a855b2f01582eee51.pdf?index=trueIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_17d7d2886e704fd1996f427a7515c8f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pigolo/balobineb.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 5244 bytes
SHA-256: a7d64325fd4aebea1d9f15d58836bc3bd570c224b0435390b093b7ed0fe6d5c5
font_01_sfnt_off00010bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCE 10468 bytes
SHA-256: 8b0d47f32b4c5df66e91439ab786fd8e70797c9197518ad8c0a9ff5361677029

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