Malicious PDF — malware analysis report

Static analysis result for SHA-256 285861c6f143d4b3…

MALICIOUS

PDF

92.9 KB Created: 2021-03-07 11:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 54a7e1cdc160683cdd2c8dff3eb64493 SHA-1: 40d7d2c61d47bbbf377306e624901856964a48c7 SHA-256: 285861c6f143d4b315ad8845329cc6ed7ee1c33b6c3a884a35354c99f6a14f70
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that leads to a suspicious domain, identified as a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a theme of financial advice, which is a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=when+to+enter+a+stock+trade PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5ff622dfbad19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fdec8b1a6657.pdfIn PDF document text
    • http://itanto.space/how_can_you_help_someone_who_is_stressed_outedx81.pdfIn PDF document text
    • http://italiahot.fun/how_much_money_does_a_childcare_director_make0sigd.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupiba/9iahfGQ/evolved_werewolf_vs_vampire_skyrim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fdd4127736cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369179/normal_600882671b0a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5fd05a86a5e1e.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/Thbgctb/desexeke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445324/normal_5fec8f9d7f4fa.pdfIn PDF document text
    • http://thesimplycompleteseries.com/hp_j4680_no_scan_options9u4we.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404725/normal_5ffffe077e7f3.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/jjidrJq/98645314246.pdfIn PDF document text
    • http://se-mrush.com/siwojijiperikux43uum.pdfIn PDF document text
    • http://rankingcoach-seo.com/plato_apology_and_critoveg2o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_600d547aac858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477916/normal_5ffad04a72e8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3c4025-b5a0-4c52-8b22-1fd10d343ff3/guxalatuziperev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc02daf2-d9d2-4afb-910d-7cb4cdadceb4/how_do_i_fix_my_water_dispenser.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/46786164797.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/gumolefubo.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_off00012d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D29 5072 bytes
SHA-256: 018755597f27efbc4e959526f47e5dcb267cb9b30cb0795dcef6e0275278e1c0
font_01_sfnt_off00013e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6E 11824 bytes
SHA-256: 6b884696e0f7f78cac8426508a0abec763d08cb85825a5e7c22d5808b85d9a3f

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