Malicious PDF — malware analysis report

Static analysis result for SHA-256 6367b61553d398a9…

MALICIOUS

PDF

64.4 KB Created: 2021-02-20 02:33:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c839ae815c69d08849b1a2fad4e6af1b SHA-1: f3e2ee6ad3e5a690d8399a2c64f0e07d410a0afd SHA-256: 6367b61553d398a9e6ff8a083d3b2750944cbb77388cccb37accf80c7b6864ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded URLs that lead to link farms and potentially malicious content, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, appears to be a lure related to vacuum cleaner maintenance, directing users to a URL that mimics a search result. This suggests an attempt to trick users into visiting a site that likely hosts further malicious content or exploits.

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://seumenha.ru/wb?keyword=how%20to%20clean%20dyson%20v6%20absolute%20cordless%20vacuum PDF link annotation
    • http://teplotronic.ru/326312299162jicg.pdfIn PDF document text
    • http://dreabling.online/wipolinaxukofnl65m.pdfIn PDF document text
    • http://justiciaforjustice.com/garfield_movie_free_in_tamilmi9sm.pdfIn PDF document text
    • http://detonic-italy.website/565090175846kxm7.pdfIn PDF document text
    • http://sushibara.net/bordereau_report_example3u5yf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392661/normal_5fe52f6c7bda6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_60221069466e9.pdfIn PDF document text
    • http://magnitoli-2ekran.site/zifopikumopafifipokaduwyyn3a.pdfIn PDF document text
    • http://kotexob.iblogger.org/take_off_past_tense_form.pdfIn PDF document text
    • http://guzowomofe.iblogger.org/53427116616.pdfIn PDF document text
    • http://detonicro.website/introduction_to_data_mining_pang-ning_tan_downloadepg8h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://devoleresi.rf.gd/11872519995.pdfIn PDF document text
    • http://tulufuparogig.epizy.com/dawugupinewon.pdfIn PDF document text
    • http://xajokaxakubif.rf.gd/65769219287.pdfIn PDF document text
    • http://dovabaz.epizy.com/assessment_centre_group_exercise_ideas.pdfIn PDF document text
    • http://tinosizifaxuful.epizy.com/32185345748.pdfIn PDF document text
    • http://dizoduji.rf.gd/21678223588.pdfIn PDF document text
    • http://sebefebopo.rf.gd/rexixazowu.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_off0000c0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B4 5596 bytes
SHA-256: 1d92c29cf13db397244c61f13c38752ba3e0a0759a09855c9a0127cbbf9ed4c5
font_01_sfnt_off0000d3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BC 9580 bytes
SHA-256: 85034ce0033916029af088d54a47c302da292bd2cc718eba926ba8d961080c50

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