Malicious PDF — malware analysis report

Static analysis result for SHA-256 de35915a924a141d…

MALICIOUS

PDF

89.6 KB Created: 2021-09-16 18:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdd85731cc1837f4d5d3255778ae5d6a SHA-1: 9afc5371f792facb5a439ea0d27846ee70da381f SHA-256: de35915a924a141d0a74df5ae46557dfa88ca13860ac1c8094fa7adefa4d9c90
236 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of an advance-fee scam. It contains lures related to lotteries or prize winnings, combined with instructions to copy and paste content into a command-line interface, likely to execute a malicious payload. The document also hosts numerous links to other PDF files on various domains, suggesting a link farm or distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fujieshubao.com/zk/UploadFile/file/2021090918145373499.pdf
    • http://we2meeting.com/ckfinder/userfiles/publics/files/84294332132.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/k2vivlg1djhvm24gt71c96lub3/81839616930.pdf
    • https://cam-ceeds.org/ckfinder/userfiles/files/togugine.pdf
    • http://share-world.tw/userfiles/file/40829768843.pdf
    • http://norilskgu.ru/userfiles/file/37329174680.pdf
    • http://golfvillageonline.com/userfiles/file/jugusupeliputokaluzuvos.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f06b24a0ba---gibegawuvomoliribirikarun.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161311fc0c6790---wibudebejeb.pdf
    • http://ekmeta.lt/failai/file/11321655796.pdf
    • http://www.celso.org/download/vixonipes.pdf
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/84448664443.pdf
    • https://mimpishio1.com/contents/files/50957137938.pdf
    • https://ocw.tw/uploads/files/rolelumu.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161406378bb0c8---27469898440.pdf
    • http://taeguektour.com/FileData/ckfinder/files/20210908_0AAAAD6983A869C3.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c694b4e1516e17888495a41356f0abc8/wolovanubu.pdf
    • http://iamsong.vn/uploads/files/51883700046.pdf
    • https://ms02bet.com/contents/files/vifonigijuga.pdf
    • http://gesundezellen.com/neu/userfiles/file/vuguzefezuzuki.pdf
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/22176349912.pdf
    • http://jurabos.nl/include/editor/file/relepunolowevojadev.pdf
    • http://whipitleather.com/userfiles/file/tizakolikez.pdf
    • https://navoloki.mebel18.com/uploads/files/mudikewosu.pdf
    • http://kaztelcom.kz/ckfinder/userfiles/files/linak.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7ba6d6a9be322ba302367ca51bff48f5/64404102552.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=conda+new+environment+python+3.7
    • 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_off0000f4ea.bin
872acc57d51cfcb96aad898dc0cf5b63adadeb7631565651e6f2c7c9beb36446		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 18764 bytes
font_01_sfnt_off000126fd.bin
d737c60602de24fa92c975d6223d980523cfe35bd0839925db649d777da60a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126FD 11028 bytes
font_02_sfnt_off0001409a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1409A 16792 bytes

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