Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cf70017cae0924…

MALICIOUS

PDF

74.1 KB Created: 2021-03-12 14:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be9ce9ba8bfae836ca4dbbcea56aa5ff SHA-1: e9aa8bffceb318f13e6dbdee8d85a3158848ae26 SHA-256: e9cf70017cae0924ee54ee3196b7802f5e06cdef9596dc04082f36d7726ebfc9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged as malicious by ML classifiers and ClamAV, and contains heuristics indicating an advance-fee scam lure. It embeds numerous external links, including one to 'maypoin.ru', suggesting an attempt to direct users to malicious content or phishing sites. The document body, though heavily corrupted, contains fragments related to application forms and keywords associated with scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/award?keyword=rte+application+form+download+pdf
    • https://static.s123-cdn-static.com/uploads/4416326/normal_5ff7f1f042033.pdf
    • https://cdn.sqhk.co/zopimoforaja/bsidV5S/ssc_calendar_2020-_21_download.pdf
    • https://cdn.sqhk.co/libuzewis/kdbhcie/61332738838.pdf
    • https://cdn-cms.f-static.net/uploads/4412584/normal_600cc107cd9c9.pdf
    • https://likufugusatu.weebly.com/uploads/1/3/1/4/131406708/gibigogu.pdf
    • https://static.s123-cdn-static.com/uploads/4503578/normal_5fe331b067a2c.pdf
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/2901945.pdf
    • https://sudiduku.weebly.com/uploads/1/3/1/4/131452825/vusivorepud-pubegam-loxazexewugi.pdf
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/faxofo-sujut-derelitet-mepidozo.pdf
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5fc692d52bdef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pasutiz/diono_radian_3qx.pdf
    • https://s3.amazonaws.com/vigevot/sociological_imagination_theory.pdf
    • https://s3.amazonaws.com/sewamos/c_programming_basic_concepts_in_hindi.pdf
    • https://s3.amazonaws.com/juduk/gk_leotards_size_guide.pdf
    • https://s3.amazonaws.com/fajeloninesitel/57781283100.pdf
    • http://pevurabune.rf.gd/introduction_to_electricity_and_magnetism_book.pdf
    • https://s3.amazonaws.com/vizegemawokaxe/online_admission_form_format_for_college.pdf
    • http://sedunadilame.rf.gd/garegudezoluguzagemi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e663.bin
98d770d4707ff65282f21e0807e55c764ed5ba7465145961b4a2605f3521714e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 5220 bytes
font_01_sfnt_off0000f827.bin
4717e8532b991011ad3882ee7e70693744cfe4bfcc5ba582af4b64f8a1a6acd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF827 10312 bytes

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