Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c9ab426d6f24ef…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 04:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: db3ab0acc7ec9c2bd6a256b6f62d7675 SHA-1: 1cea19a20e924a1e723afd3b60e5dad9dfae51e2 SHA-256: d6c9ab426d6f24ef0b4631f74b4eb9ad9d81ab6cf7d75c496b375b9b53e93960
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'jacksth.ru/award', suggesting a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for multiple links, further supporting malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=coaching+ontologico+echeverria+pdf PDF link annotation
    • http://aires.fun/conjunctive_adverbs_free_worksheetsla433.pdfIn PDF document text
    • http://ig-socialmedia.xyz/sopoduxudjcwt.pdfIn PDF document text
    • http://sabowupab.iblogger.org/97280599589.pdfIn PDF document text
    • http://classicalnaturally.com/daburewuxemexufejisajremf2.pdfIn PDF document text
    • http://cashthe.ru/mythology_by_edith_hamilton_quotes03h74.pdfIn PDF document text
    • http://kapubasezo.iblogger.org/78550500314.pdfIn PDF document text
    • http://carbackseat.site/xutabubad6im1.pdfIn PDF document text
    • http://tuvawom.iblogger.org/pebaketeju.pdfIn PDF document text
    • http://copyrighthelpcentral.com/wexulorulejalizigetumi845.pdfIn PDF document text
    • http://joy-todays.online/63246861911s5vsj.pdfIn PDF document text
    • http://goodxday.xyz/vojezizidikexefemaper38emb.pdfIn PDF document text
    • http://heleogose.online/background_blue_pic5q6eq.pdfIn PDF document text
    • http://lisipezasuk.iblogger.org/easy_guitar_ensemble_music.pdfIn PDF document text
    • http://help-bluebadgecenter.com/slow_peaceful_and_calming_piano_musictqxpl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_eba94b195d2d4a44b56bd704338a4098.pdf?index=trueIn PDF document text
    • http://waginafudipid.rf.gd/5435265426.pdfIn PDF document text
    • http://rifovedukuj.epizy.com/soundcloud_er_free_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27244582-a098-4da8-ba44-1fb0f3823eba/solving_quadratic_inequalities_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f42238-d2e8-4459-aabe-4f6c376818f0/simplicity_broadmoor_steering_problems.pdfIn PDF document text
    • http://zikomum.epizy.com/5053568633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd881e57-9978-4add-a0cf-8a4857b66ce2/32977928395.pdfIn PDF document text
    • http://mogaros.rf.gd/bekojup.pdfIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_7d2c07a1ad8b46288fc2df17c6a4b9bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1a5d5c-dd30-4d9a-84fd-819c3b12b13d/78690926072.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/verbe_avoir_anglais_forme_interrogative.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_off0000f346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 5204 bytes
SHA-256: 6cd138dd3e33a17268d7209a7c3529165bda9e6c25f7d5380a1c0fd2ea5df61c
font_01_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 13436 bytes
SHA-256: 170f792b3a611f9080b1c9d66f2dd8d1a621c4d7bfa8801332aad10981f6b99a

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