Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bc8f282a6cada6…

MALICIOUS

PDF

84.0 KB Created: 2021-05-18 22:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c5dc05488d76ff3c8052c7be93b445e1 SHA-1: 8e7b8edb0ae39a0fca73de67adc8250991b6bc2d SHA-256: 67bc8f282a6cada6a87af67a51038716e1fcb1292b91628b57216950476df06b
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 0.9997

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 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://kuzutuzo.ru/strik?utm_term=database+systems+the+complete+book+solutions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401691/normal_6042217b7f321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_6018d2f0b4a1b.pdfIn PDF document text
    • https://bukemabo.weebly.com/uploads/1/3/4/6/134653237/8831638.pdfIn PDF document text
    • https://zugowexilib.weebly.com/uploads/1/3/5/3/135349829/c690c016459d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490266/normal_5fcb9d076fbeb.pdfIn PDF document text
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/ripujeliwufunuxib.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/bulikowexunepov/bupepupetexitazek.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/ejercicios_y_problemas_de_resolucin_de_tringulos_rectngulos_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/boundary_layer_theory_h._schlichting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b436b5-cc05-47da-9d03-1e267a5493ab/sodovinemag.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/voot_app_colors_kannada_kinnari.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/gawevusuxixiwoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/how_much_do_real_estate_classes_cost_in_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/find_the_crackers_amazon_quiz_answers_today.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/24419823754.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/railway_track_hd_background.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/zavujibugijopu.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/apa_itu_t_test.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/banotudijigemij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e43beba-2b1f-4c19-9a22-216b902bb90c/comprar_el_libro_azul_del_padre_gobbi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 5484 bytes
SHA-256: 6766307c02cff27d995c1937f6b825c802805db2a04c99ffe88f7eb9fe66c702
font_01_sfnt_off00010b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 12452 bytes
SHA-256: c57b681a00a0997728cfac79412ea9341b8ddbdbe9f17810c0bfd458527aa1c4
font_02_sfnt_off00013466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13466 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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