Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6173dd06fbe7a7e…

MALICIOUS

PDF

114.0 KB Created: 2021-09-02 19:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 467a6cdacd5a24b27c7ca159e9d405c9 SHA-1: faab870acbfdd9dd29f2632a2c2b09ea8187cdf4 SHA-256: f6173dd06fbe7a7e77beb1a3cf165394513a463765b61bee21c5a2a1c5a63a39
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. The heuristics indicate it is part of an advance-fee scam, likely luring victims with promises of prizes or funds. The document contains numerous links to external PDFs hosted on compromised websites, suggesting a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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.
  • 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 https://vsetinrally.cz/userfiles/file/duvuretaxevetuzopubixowix.pdf
    • http://www.verneteco.com/ckfinder/userfiles/files/zevavutorenesebosobitovam.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d14198eb43---datidalo.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e17ecf564---42773823112.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/13a7f365ffb93be4036d569f02816688/dabelurutumofovusozilisi.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f095e3fc3a---lijepa.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/hl71pt3tds0iiboktro0662m07/49512235819.pdf
    • http://bettynblue.com/upload/fck_img/20210816/file/jajapalosabepexetametare.pdf
    • https://airshow-bg.com/file/mogebun.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075d95d4f8a7---6509573177.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/9600e06ed31b50cf161fc7885f46139b/zunilibetak.pdf
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/80038335216.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/q3qrv8es0jcl1aiooofgtbulal/82233904818.pdf
    • https://accuratesearch.com/userfiles/file/91026767059.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd9c6dcfc5---jakulojabaz.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/51c900806f91fa278ca9cf8d55c2d434/88259069228.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/5847e20e1b3402c0649b8666034bbf28/10618596581.pdf
    • http://mamam.by/upload/File/file/wirebejezikel.pdf
    • http://alwaditrading.com/userfiles/files/66346523906.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608505c1bb242---bifik.pdf
    • http://alanurturizm.com/rsm/files/81235470000.pdf
    • https://shiokerbau1.com/contents//files/94514935923.pdf
    • http://al-bandak.com/userfiles/file/sosulupiguropanosizoja.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff6ffcb695a---51710178992.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/7362ngjcaml76mb6kj0h9jjlr2/zejenilelemozegidizinos.pdf
    • http://gayaarchi.com/userfiles/file/20210525130622.pdf
    • http://tz5168.com/uploadfile/image/2021/06/26/file/20210626_013625_131.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=glossary+of+commercial+real+estate+terms+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://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_off00015b6c.bin
d3d20d8537b86faf33f6879a7155556487d5214a40e33a451cd3d6711eb08567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B6C 10828 bytes
font_01_sfnt_off0001747c.bin
f4570e06be38ee52bd56df7620dc088494bdca0e93702422c34c98ca534b7053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1747C 17232 bytes
font_02_sfnt_off0001a1c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1C3 16792 bytes

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