Malicious PDF — malware analysis report

Static analysis result for SHA-256 344266779bc7194d…

MALICIOUS

PDF

79.7 KB Created: 2021-03-11 12:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c0f3ba3db379c4fe1eb5d4a331b7b9c5 SHA-1: 753ec6812baf674faea0a964f09791055dd0269b SHA-256: 344266779bc7194db5b89be2834b1c659af592803f99db7528a49dee7e84b0c6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The PDF's structure and embedded content indicate an attempt to deceive users, likely through a phishing lure, which is consistent with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/award?keyword=tutorial+de+camtasia+9+en+espa%25C3%25B1ol+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427504/normal_600897f7765bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392215/normal_5fffc3fb21e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_6032046a02bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420235/normal_60180db4002f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_601b5197d1ca8.pdfIn PDF document text
    • http://kegujusotuk.iblogger.org/60822109467.pdfIn PDF document text
    • http://my-favshopc.online/nejokidovemujuhgeqx.pdfIn PDF document text
    • http://defiboxifef.22web.org/8102762196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_6041c807bc57e.pdfIn PDF document text
    • http://jajotagesawize.iblogger.org/mapa_de_riesgos_la_paz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469850/normal_6037d533e3cda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379043/normal_5ffbcf72e28b9.pdfIn PDF document text
    • http://stat-index-co.com/kiwixulabuxedinatif5uvjf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_6036586810fd4.pdfIn PDF document text
    • http://blue-tick-central.com/basic_programming_commands6j25g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_5fe6e9e0f028e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473064/normal_5fc8a562dd5b4.pdfIn PDF document text
    • http://tikenifoziv.22web.org/free_annual_equifax_credit_report_and_score.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zideniniwos.epizy.com/11045122240.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/sad_and_sorrow_flute_sheet_music.pdfIn PDF document text
    • http://bumojomoso.rf.gd/felicitation_certificate_template.pdfIn PDF document text
    • http://niruvizuzeta.epizy.com/12157525142.pdfIn PDF document text
    • http://duvexarido.epizy.com/parebi.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_off0000f8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B7 5616 bytes
SHA-256: e54a2b0d8d1cbfd9645482848ff566d7ce4bbd047a59386ee2cec66554d86a5c
font_01_sfnt_off00010b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B72 10840 bytes
SHA-256: 97db430fd2aaafb7574db53f06b126b338ec8910fce13b20b1be5f67b4ded73d

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