Malicious PDF — malware analysis report

Static analysis result for SHA-256 619dcbad4b2b8d62…

MALICIOUS

PDF

77.4 KB Created: 2021-01-26 22:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bce89ecde38f02d949dd7eca413bcb1f SHA-1: 974253cc15cd57d7b54d21ee40986a88f391383c SHA-256: 619dcbad4b2b8d621b553a259455fa83a4c6f2b715269e494e64718499b552d0
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The document body mentions "Spacex launch live" and includes metadata from wkhtmltopdf, suggesting a lure to redirect users to potentially malicious content hosted on domains like traffset.ru. The presence of numerous external URIs and link farm indicators points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/wb?keyword=spacex%20launch%20live PDF link annotation
    • https://cdn.sqhk.co/vusutazomaga/igichcJ/mega_win_slots.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/jigfgf0/vifesed.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/tsrhgwd/faferinafubapubukep.pdfIn PDF document text
    • http://dujifasuda.iblogger.org/38823004714.pdfIn PDF document text
    • https://cdn.sqhk.co/kojogitu/vkHKhfo/game_ares_virus_mod_apk_1._0._4.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/QCiihg3/pevukepa.pdfIn PDF document text
    • http://teleporttur.ru/17263679441o6bjj.pdfIn PDF document text
    • http://lozhobelir.space/nyc_311_parkingy0blg.pdfIn PDF document text
    • http://resimpub.com/10587414364x1ptf.pdfIn PDF document text
    • https://cdn.sqhk.co/vanatuwo/agfggjh/download_game_flip_diving_cheat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mokimonanogi.rf.gd/action_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/tabebazorusuwurepazefiriw.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/manchester_united_8_arsenal_2_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/68440655566.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/supalutekoganagaxaxon.pdfIn PDF document text
    • http://sujemitusosida.epizy.com/ableton_live_8_intro.pdfIn PDF document text
    • http://budunasetixap.epizy.com/blue_label_telecoms_ltd_annual_report_2017.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC89 4976 bytes
SHA-256: eef452f516a5e4257974aafaa47f540a8f46b7af181c8b4a35dcc5331a49492d
font_01_sfnt_off0000ed80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED80 11200 bytes
SHA-256: ccb2f097511bc1eb4371dc92086bd17e76a2fe96bf4f55bf8709bd5e74b3b32d
font_02_sfnt_off000113f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F7 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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