Malicious PDF — malware analysis report

Static analysis result for SHA-256 297c1a6421de34a8…

MALICIOUS

PDF

72.0 KB Created: 2021-06-09 14:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d0714626b2f13d2477e94fc9c161e743 SHA-1: ccfe1f2b1dd4299656758859a04161634e8fd0f9 SHA-256: 297c1a6421de34a8ccc5c2c446f001ab51eb056016f54b428603e0ef620b021a
186 Risk Score

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 6

  • 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.
  • 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://coretry.ru/pbw?utm_term=fnaf+4+apk+download+android PDF link annotation
    • https://diwosilanula.weebly.com/uploads/1/3/4/7/134765308/072d3b1414.pdfIn PDF document text
    • https://rorafuduvu.weebly.com/uploads/1/3/7/5/137509028/1831114.pdfIn PDF document text
    • https://vavepinabuma.weebly.com/uploads/1/3/5/3/135303395/8767476.pdfIn PDF document text
    • https://sinijeba.weebly.com/uploads/1/3/5/3/135329812/pelasi.pdfIn PDF document text
    • https://wubepina.weebly.com/uploads/1/3/4/7/134721378/077989c0723.pdfIn PDF document text
    • https://teditiwos.weebly.com/uploads/1/3/2/6/132681477/pabanutap.pdfIn PDF document text
    • https://sixoribena.weebly.com/uploads/1/3/4/8/134848884/771963.pdfIn PDF document text
    • https://sugevemaketajes.weebly.com/uploads/1/3/4/8/134873201/d85045d85de8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144918111/mod_apk_pubg_unlimited_money.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144613608/what_are_the_different_types_of_3d_printers.pdfIn PDF document text
    • http://sovamexor.pbworks.com/w/file/fetch/144660261/math_154b_solving_using_the_quadratic_formula_worksheet_answer_key_with_work.pdfIn PDF document text
    • http://kenoxipej.pbworks.com/f/food_list_for_advocare_24_day_challenge.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/w/file/fetch/144604749/how_to_set_armitron_pro_sport.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/zomuwixuxukuragibuxabeguj.pdfIn PDF document text
    • http://jabodawo.pbworks.com/f/mod_lspdfr_gta_5_xbox_one.pdfIn PDF document text
    • http://zikasamu.pbworks.com/f/10077219201.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144779091/13704259726.pdfIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144948804/tharagani_baruvaina_lyrics.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/74184117697.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_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 5056 bytes
SHA-256: 59962db7c1ae312d0f406bf33a4e4e0ebcc9b9f6a0940ce8b249d051de8ed1f9
font_01_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 10632 bytes
SHA-256: bf29278acce1cdd1d14bc88f16f48333fb9b2e7fcee2827dd62ec15d556dcf69

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