Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c43bc2f55757a27…

MALICIOUS

PDF

84.7 KB Created: 2021-09-16 01:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d114f138abd67bb55b2b868357b0540c SHA-1: 2ecbb5fd61bf758553314261394759a06ca6cedd SHA-256: 3c43bc2f55757a274154534000f3dd39dd112330517766a3202ec326381ef9e3
174 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries or parcel deliveries to trick victims. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The high ML classifier output and ClamAV detection further support its malicious nature, indicating it likely serves as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://euromarkcreations.com/new/fck_img/file/jafirusikibugixevigejakuj.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/6261661926141b44076b5f.pdf
    • https://bandotrading.it/uploads/file/85168305935.pdf
    • http://tko.wavedev.net/img/files/files/dafuj.pdf
    • https://bywuf.org/upload/editor/files/lumejiz.pdf
    • http://heathrowairporttaxi.website/userfiles/file/tefusamewuzor.pdf
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/74390507821.pdf
    • http://leeandrewdavison.com/download/16100557861.pdf
    • http://wronba.com/uploads/wysiwyg/file/75968355008.pdf
    • http://pazzo.jp/js/upload/files/91461995577.pdf
    • https://mobilaide.com/upload/editor/file/lisuru.pdf
    • http://yugang360.com/upload_fck/file/2021-9-4/20210904163838178107.pdf
    • https://duongthuy.net/userfiles/file/81655842688.pdf
    • http://robertoantoniz.com/resources/original/file/35328115553.pdf
    • http://vanprodukt.cz/UserFiles/File/47351389400.pdf
    • https://navliecky.net/userfiles/file/tiwonavuz.pdf
    • https://pakianco.ir/data/image/uploads/news/files/rizifosiregefobazitor.pdf
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/98745731937.pdf
    • http://saigonford3s.com/uploads/2021-09-07/images/files/vovowesiwavamafekod.pdf
    • https://floridainvestment.cz/files/file/58219594675.pdf
    • http://chrisdepanneservices.fr/Sites/cds/files/vesopakazuleluranomumam.pdf
    • http://yjsyrj.com/userfiles/file/garux.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16140252e0303c---rezuwatozunesovabopev.pdf
    • https://rubfila.in/files/file/53122765122.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+setup+outlook+in+android+phone
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 16792 bytes
font_01_sfnt_off0000fe51.bin
fada1b151574facd156da772639a930aadfae2983b82a32a69ec3085304f1193		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE51 10760 bytes
font_02_sfnt_off000116fb.bin
9428247599cd311121c153f674c6a171d5c9c69fbdc3a4f29388ebb2188aea65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116FB 17812 bytes

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