Malicious PDF — malware analysis report

Static analysis result for SHA-256 139ea908fc920742…

MALICIOUS

PDF

85.9 KB Created: 2021-09-16 06:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 816af6079bb6e5ab9767ef88313f1a60 SHA-1: b2160643c5f2f2c282b96260a7ab53eff45df36d SHA-256: 139ea908fc920742a26f3f79fda3a5fa262f08b0812df300cc0e1fcd9ea9fbed
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. The document's structure and heuristic firings indicate it is designed to deceive users with promises of prizes or funds, requiring them to interact with external links. The presence of numerous external links, many pointing to PDF files on distinct domains, reinforces the phishing and scam nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://asupuro.com/upload/save_image/files/89645712980.pdf
    • https://bandai-k.com/userfiles/file/4583989191.pdf
    • https://maymac.info/userfiles/file/14037556845.pdf
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/fogelodozifujisemapowi.pdf
    • https://vleek.com/uploads/files/41405160314.pdf
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/tenukerukekudasepumepubo.pdf
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/42632278834.pdf
    • http://vzwsportenmuziek.com/content_docs/32480386923.pdf
    • https://cryptobasics.biz/uploads/files/pazafepepam.pdf
    • https://olterus.net/contents/files/ramujitisut.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161426d5448504---23592729235.pdf
    • http://manpukulivermore.com/uploads/files/kefisigaxavomepagexutinu.pdf
    • https://aneri12.eu/res/file/7777243500.pdf
    • https://promobryansk.ru/userfiles/files/zilodosusepemedo.pdf
    • http://vijyaiprismcrm.com/userfiles/files/30224867667.pdf
    • http://www.agot.pl/upload/file/74517400018.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/ada37a4e3e234e780739f2b2ebb1c79a/vuwirijozixuwewikexetejuw.pdf
    • http://dui-antidote.net/images/userfiles/file/83630034363.pdf
    • http://sicompk.com/survey/userfiles/files/20140290856.pdf
    • https://fullgame.hu/uploads/files/pudusex.pdf
    • http://knauto.com/upload/file///30461326648.pdf
    • http://euroteam.vn/ckfinder/userfiles/files/53269084801.pdf
    • https://knoxvilleremembers.com/media/pigijijuketezajawigam.pdf
    • http://backupcenters.com/userfiles/file/74325050819.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=steps+to+unlock+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_off0000eabc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 16792 bytes
font_01_sfnt_off000102d3.bin
6a25da74f4d96f538c91c297b651d1b21889bea86cf6f0746c04f58e6092d018		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 10880 bytes
font_02_sfnt_off00011bda.bin
321b1e77c6a1c1374fb7fcba5994b47e3e7e7ec70abffa60783be9cad2c10768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDA 17620 bytes

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