Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2e86f716475e99…

MALICIOUS

PDF

73.8 KB Created: 2021-02-16 02:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8659b2e056e414abd2298cbe01907b65 SHA-1: 56c90c8f713eb463e35251ffc20f3b2f40ddaaf1 SHA-256: 3c2e86f716475e99540064de5681f4a0477f7be5a8d0cf54e27c7630bf37b5c6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains text related to 'teaching english as a second language courses sydney', suggesting a phishing or social engineering lure. The presence of external URIs and the overall classification indicate an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

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://bologen.ru/strik?utm_term=teaching+english+as+a+second+language+courses+sydney PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5fcaa09351cd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444646/normal_5fe51afb32356.pdfIn PDF document text
    • http://casser.xyz/jikedusibufunutepa5qfoc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480755/normal_5fc8829c09618.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/idiechi/skip_bo_card_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_6014d79fcf03e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5fcbe9eba2696.pdfIn PDF document text
    • https://cdn.sqhk.co/mofinopedas/h8jihd5/20398318941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_5fd74a3b08d96.pdfIn PDF document text
    • http://vinnipoh.space/limudedefabizefetg4rha.pdfIn PDF document text
    • http://citruss.space/how_to_remove_pimple_marks_in_hindi_language12sfh.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/juiieyn/mlb_news_and_rumors_phillies.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/poijXWz/blades_of_brim_hacked_apk.pdfIn PDF document text
    • http://godevibusaxinoj.22web.org/22252189642.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/genedesowul/capacitive_stylus_for_android.pdfIn PDF document text
    • http://volulel.rf.gd/civ_5_guided_missile_upkeep.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/63760567494.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/kelington_group_berhad_annual_report.pdfIn PDF document text
    • http://dapubul.rf.gd/66815944144.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/46212373241.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_off0000e37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 5252 bytes
SHA-256: 82116fa4f9726e54e19c832d9ac43fcd75bd3d38aff21b7c609dec98cbe1d702
font_01_sfnt_off0000f55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 10560 bytes
SHA-256: c0f6720d9d8c86f0eec142707ec9c27c9e8320113dfa766a7fb50890bfaa9b0d

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