Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef64abb0159ef04…

MALICIOUS

PDF

244.2 KB Created: 2021-07-05 17:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6469a49556a633824d2c0f72fd0eeac SHA-1: 915425770096286a4c2828bfbc7621fc23e04b10 SHA-256: 2ef64abb0159ef04381ffdddeb8868d80381433c6314c0594620b5465a75659c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on compromised CMS upload directories, suggesting a distribution mechanism that exploits vulnerable websites. The document body is heavily obfuscated and unreadable, but the heuristic firings strongly indicate a lure for a fraudulent scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9777

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.
  • 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.
  • 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://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a855d997a1db3645c5953a25b89ff9d9/jipaku.pdf
    • https://upbilbao.com/ckfinder/userfiles/files/kirosetozek.pdf
    • https://fetogram.ir/images/upload/files/dativimelunuwipajiniw.pdf
    • https://nhachoxebus.com/upload/fck/file/81512599833.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073f1eece211---71397678439.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/c10554923f4ca1fea6ed081e6296f58c/87443539317.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834bc36ecb3---68100435049.pdf
    • https://cornerstonelaw.eu/userfiles//file/zurugape.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/5ef512388a19a786f3ee0f153a013f6d/takerifew.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec4d8063c6---roloperu.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/1d800adb1d89aa2d9498abbb432a66f5/14953758003.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b80d2f65f17---vigozimuwinoxajedevoli.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d050e78424---24571235432.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab8e0e0d01---lujezow.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/dd9dc50a9cb0ff4a2bd7069d9be8ecb9/zesatabimomevotorulib.pdf
    • https://atpl.aero/ckfinder/userfiles/files/98927115220.pdf
    • http://rajhansnursery.com/userfiles/file/48799349673.pdf
    • http://studiomalpocher.it/userfiles/files/20072831331.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/wuzuwexu.pdf
    • http://immobilieninvestors.eu/userfiles/file/nipizepogizitarinakiwema.pdf
    • https://aparcaderoshaddaichile.cl/uploads/images/files/jutodis.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/c2abccefb6b4a461410a1f724831bae8/likoxutuk.pdf
    • http://sakaryakasaplarodasi.org/userfiles/file/4236282950.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/91419cb16b9cb53983afd370927835b9/47791819462.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ee54b8f9a8be1a85c1de689ab5b0699f/foxugexinemigatafixosijag.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=seed+for+sand+temple+in+minecraft
    • 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_off00033e36.bin
ada644b10775753762f5b82c2158f7ba21c851a7c510891776d8326739060e3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x33E36 10856 bytes
font_01_sfnt_off00035737.bin
0e3d63f173342003c62a86c726d4d5a85e7f52d44cf06618766a4fa08a0866bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x35737 16088 bytes
font_02_sfnt_off00036c66.bin
5c2f3d273a38a7be5c472ca23d0fc3f1c8916773242c507f95ef8b72790e9e60
pdf-font-stream PDF embedded font (sfnt) at offset 0x36C66 24232 bytes
font_03_sfnt_off0003a9e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3A9E4 16792 bytes