Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbb0d5d872af32c…

MALICIOUS

PDF

89.3 KB Created: 2021-07-02 13:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3b12a5869194eb7e0a0a899d52d3ef4 SHA-1: f5769a2cdb7d11cf2f00d7866e6895482cd9957d SHA-256: cdbb0d5d872af32c2eee3065c773adee92af4e96b5007a5b5633658ae692c92f
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or redirection attempt. The primary goal appears to be tricking the user into believing they are receiving a prize or parcel, which requires payment of fees.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=composition+java+code
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7fdf0e78c3b1d4d1d2af34ea8a47b717/lavuzosedififebujagi.pdf
    • https://riondene.ch/img/uploads/file/zuril.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/0c4e151d44e6b9355188aa6ddc2e633e/takudinone.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b376d0a90b---41139224948.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/f2efdf211ff2b0c2f7317b7cb6da427e/situp.pdf
    • http://www.allatpatikapecs.hu/images/file/46337222991.pdf
    • https://vishalahospitality.com/ckfinder/userfiles/files/41676068852.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/09earks2dklaf58pqg6td9ge32/dawepera.pdf
    • https://bandai-k.com/userfiles/file/96045910970.pdf
    • http://annandale1963.com/clients/69704/File/68325683709.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/45729324e14ce2d66ea34e5c7dabbc1f/90770864821.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073adf1e33aa---wivafapaj.pdf
    • http://loveperfectionschool.com/upload/file/wiwinasipamugibaji.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cb6732424---ganopixoxup.pdf
    • https://euroroma-bg.org/files/file/wogalalegas.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/iv1jtqq1me65oaf0p7lgrqmbj3/povef.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0253b98e3e---10759365604.pdf
    • https://foundryindia.org/userfiles/file/70137189581.pdf
    • https://okinawa4d.com/contents//files/81769901006.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a954a9d6cb4---48218878127.pdf
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82109304393.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cf474239a7d---42731509068.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16071da7114f56---84115715490.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_off0000fa3a.bin
eef68ff8df0a52d33daa942663545e0546bb571ea08dd91e61e75719a4026cbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 10756 bytes
font_01_sfnt_off00011303.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11303 16792 bytes
font_02_sfnt_off00012b15.bin
aaaafc92ac8fa66fb107cff0c4454c87ea7b70f7847cb6ee4feb3f93c095216b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B15 17308 bytes

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