Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f6dd12faf38dd4…

MALICIOUS

PDF

78.4 KB Created: 2021-04-19 11:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1b3382795dc9fa19e23fa557a905dea5 SHA-1: 6702309eb06904e8da5ccdd341f931a7e80db953 SHA-256: c5f6dd12faf38dd4b236b7608754af8d21695ea864cbb83938a887512706d969
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 0.9997

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://zajinet.ru/strik?utm_term=is+the+uk+justice+system+fair PDF link annotation
    • http://bezigex.iblogger.org/bharat_ane_nenu_cinema_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/i4LU99S/musicians_friend_jackson_guitars.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/dexejawovegosib.pdfIn PDF document text
    • https://wilepojaxuxag.weebly.com/uploads/1/3/4/6/134682450/2845716.pdfIn PDF document text
    • https://girodexusaxemo.weebly.com/uploads/1/3/5/3/135388358/9e8314f21.pdfIn PDF document text
    • http://wimebenese.getenjoyment.net/70840681312.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ihh3R9L/xitiximotugaxezotuwamanom.pdfIn PDF document text
    • http://kusufuxufatup.getenjoyment.net/numbers_1_100_list.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/paradise_lost_smyrna_1922_giles_milton.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/f26b7ddc09074b.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/figiwizumanujud.pdfIn PDF document text
    • https://bireguvax.weebly.com/uploads/1/3/0/7/130775683/bae23.pdfIn PDF document text
    • https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/mijujiziwise-xabosejewabam-xujetasededini.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/Z2M8jd0/gebobapajinirinopetetiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetafemef.epizy.com/mivuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f648afb7-bd85-4337-98fe-b0a9aa6928ba/32751355433.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/50348411888.pdfIn PDF document text
    • http://zajepatexesa.epizy.com/ccleaner_with_crack_latest_version.pdfIn PDF document text
    • http://robibedoramate.rf.gd/fikuwogigipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4fa7cdb-9460-4099-bb7d-7ef5f8577e72/lg_mini_split_troubleshooting_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd1cd448-0388-4a86-8c41-136bb0780d20/washington_football_team_record_this_season.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_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 5268 bytes
SHA-256: fc056d7a846cd845bda9247c4a3e5323f7b1e2302bca50b0e4bc703aa928bb8c
font_01_sfnt_off00010601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10601 11312 bytes
SHA-256: 8dcd42c7441e5492878afceea26594a604580bda152a256dc9cf7180198f51e8

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