Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2b68aee7cc4f16…

MALICIOUS

PDF

69.9 KB Created: 2021-01-31 17:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1841ff37c0def9c10ee450ff4a434d3b SHA-1: c6afa8f2e58501bdc920af33fde8063f51cf0277 SHA-256: 9c2b68aee7cc4f16ee7f760b6ee90f6ddc351aff199d7abe618e1dda2c712e70
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The document body, though partially garbled, contains text related to a poem and wkhtmltopdf, which is often used to generate PDFs from web content, further supporting the lure.

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://jottigo.ru/123?utm_term=poem+about+soldier+going+to+heaven PDF link annotation
    • http://larts.digital/sojijisejawodu5wmo3.pdfIn PDF document text
    • http://matroskin.space/flight_sim_2018_mod_apk_rexdlpohsq.pdfIn PDF document text
    • https://cdn.sqhk.co/pajugeluj/gghggcx/underhand_lat_pulldown_biceps.pdfIn PDF document text
    • http://world-wildshop.com/477501113967w7ib.pdfIn PDF document text
    • http://saudiautoinsurance.com/karcher_pressure_washer_k2.26m_manual0e4zc.pdfIn PDF document text
    • http://kekemubitaf.iblogger.org/mokupozesefuk.pdfIn PDF document text
    • http://freshka.fun/pokemon_storm_silver_documentsa9ruz.pdfIn PDF document text
    • http://6gusevshop.website/windows_loader_2.2.2_rar_downloadqgipb.pdfIn PDF document text
    • http://intereriia.com/65665429682tqoeo.pdfIn PDF document text
    • http://wowmarket.info/download_livro_bob_proctor_voce_nasceu_rico7erz0.pdfIn PDF document text
    • http://giveaway2020.info/257865850329jbsc.pdfIn PDF document text
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/8235140.pdfIn PDF document text
    • https://kiparefewegapip.weebly.com/uploads/1/3/2/6/132682538/a7a63026d1d1a.pdfIn PDF document text
    • http://mattelipsticks.site/9031705090778xe5.pdfIn PDF document text
    • http://ig-objectionform.com/kids_birthday_party_ideas_near_megmg7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xeravujowa.epizy.com/waramululifefebekafifik.pdfIn PDF document text
    • http://firuneta.rf.gd/california_mandated_reporter_training_video.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_off0000d53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53F 5440 bytes
SHA-256: 6c8dfc1760b79d24d1926ed91a189a8693dec5d65626799485ed4cd6f3ba682a
font_01_sfnt_off0000e790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE790 10272 bytes
SHA-256: d9651b7ca4bc85d537f9474ba28d763846fa0d83709dab1c59e9e88744bba471

Open this report in the interactive analyzer, or submit your own file for analysis.