Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca13e44922f7c10e…

MALICIOUS

PDF

94.0 KB Created: 2021-07-05 20:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80f69b887dfa2b6fd827f8b41319b4b7 SHA-1: 8636bb4cb8b862ba98c31aa46231e7b2747cc740 SHA-256: ca13e44922f7c10e95b7fcebe34960ceccaca06e1151d856eb8634629012dfe0
196 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The primary lure appears to be a lottery or prize notification combined with parcel delivery requirements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://ketchas.ru/uplcv?utm_term=saturated+and+unsaturated+compounds+examples
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0b9ddacc8---besupononovivopipelunevo.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741882d6341---fovomerijubemokasi.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/kknkjrhogntbiek6j73jkcc6la/46363849221.pdf
    • http://al-bandak.com/userfiles/file/gezov.pdf
    • https://bamfieldrental.com/userfiles/file/bagobaboruxeperajifo.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607729f6cc04c---69868475634.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/eccrglians4tdkmaok0f5lse66/tanupagejigomavoxanav.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/f5a377e40932947f2b9333fd6cb217ae/76847809983.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/70c5f9b5bf8f8edc4c9e506e8e6e9991/49138052581.pdf
    • http://bisenzia.it/userfiles/files/vapodoruvubedebivuzabu.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f12ec1f9e47e393c88ca5c6160e979af/94145583566.pdf
    • https://bloomland.com/sites/bloomland.com/files/95260139751.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/o2ma4cv98ee6r554ta9jjbu34p/dedekisadaro.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6e8fbba51---gupewefokeza.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb4a9cac34---97682508721.pdf
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/99378621843.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/40255be5c2546c6fc8c2deaa5cb65455/dirugefovezojupinomobere.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a5ecc152a---56754773469.pdf
    • https://anukulagrotech.com/userfiles/file/13333817317.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a8be9a897dc2c6cec1f3bd3bf8a88460/dukuxozototi.pdf
    • https://edubox.mn/uploads/users/0/files/tidoriwumolunatelofi.pdf
    • http://ngoinvest.com/uploads/ckfinder/files/namumiruwapodofa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f7.bin
b27681b39bd0a6b14d636cd32f89a0f375fae4c55a62958ae8b40526c941a05e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 16992 bytes
font_01_sfnt_off00012129.bin
7ee75ad507d2e4ada5d79e32f07a6f4b05dcefb94a9d9547c52d3ebcacbe0f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12129 10860 bytes
font_02_sfnt_off00013a41.bin
205a82feabe0d241a8dff9343c0e3dc9c054a57a6953a707af0c47b1cbaf1515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A41 16832 bytes
font_03_sfnt_off00015221.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15221 16792 bytes

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