Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c334b9011ec6aeb…

MALICIOUS

PDF

73.1 KB Created: 2021-02-10 03:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d3434ce64c19f375e2a96fd26ff6c57b SHA-1: cf9f36a6461f47fc3bd74ab5bef6db24542ec8d4 SHA-256: 6c334b9011ec6aeb590060d8704a833bda2c4d0a9c5c829c00208a4cd57ba068
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a police department form, which is then linked to external websites.

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 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://leonvi.ru/wb?keyword=co%20full%20form%20in%20police%20department PDF link annotation
    • https://moninedowilex.weebly.com/uploads/1/3/1/4/131436981/nofudofata.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/korare-gimosu-fananeruwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5feb1e12f299b.pdfIn PDF document text
    • https://vusexojepaxeva.weebly.com/uploads/1/3/4/0/134096357/3cabc07f3.pdfIn PDF document text
    • http://ewwe.space/viluzetipipe1xltp.pdfIn PDF document text
    • http://bestunew.xyz/algebraic_expressions_worksheet_tes1fuvw.pdfIn PDF document text
    • http://tertov.xyz/aloo_matar_ki_sabji68idr.pdfIn PDF document text
    • https://xibupofuku.weebly.com/uploads/1/3/5/3/135306475/xaraj.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/head_soccer_la_liga_game_onlinejrzkt.pdfIn PDF document text
    • http://islemleriniz.org/cheats_for_gta_san_andreas_pc_all_missions_completedeeal.pdfIn PDF document text
    • http://d2-club.ru/27475077173hqdg7.pdfIn PDF document text
    • http://klosheff.xyz/buretavigebuxafugomunoje3zbmx.pdfIn PDF document text
    • http://repochka.site/sheets_app_for_pcg5nam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366336/normal_5febbfc1156bb.pdfIn PDF document text
    • http://raftgjgr.space/gimoxumenuxipivpr8h9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390328/normal_5fef668269b6f.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/mogipegi/tabisag.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AA 5028 bytes
SHA-256: 3e5f285caa407f8450ed76cd0bffeb78656ee11d2b956184bfbb114b5616f716
font_01_sfnt_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 10572 bytes
SHA-256: c22f847668d07c148f15d71e3ff4becf8928276f3f64ec22989cbe89bc840405

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