Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5774cdc11321aa2…

MALICIOUS

PDF

146.0 KB Created: 2021-07-08 11:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4cf39757b18597bd74b8d43eb4b7f7a9 SHA-1: 4366438fdb31bc39bd425603f578b27cd29e00fb SHA-256: a5774cdc11321aa2e919a601b038efb9b59410fd00655710b477fd7af836c827
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on potentially compromised or disposable domains, suggesting a phishing or redirection attempt. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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://europartner2.pl/uploads/28188093264.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871d2c0cf41---26890579093.pdf
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/84627238636.pdf
    • http://xn--aknmedcal-wpbe.com/uploads/file/kowaxawasevukegisexoz.pdf
    • https://mclandpin.com/calisma2/files/uploads/pidodusideguxukege.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bce213fdf---43822765874.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7a418ba9b---27667050102.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/gv81dn2rk2k936vekapj5u60og/85642435829.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d6688dda675---14798446306.pdf
    • http://adamslakeband.org/userfiles/file/70323928867.pdf
    • http://scro.ru/pic/file/pedabola.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abdd65d9f2---nawuvagokakanalivife.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/24g4146v47hedg3j36bv4njqqp/35219432605.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/1ff7492038d9b2f761884943020936e7/kilugokesuwomu.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/wiwujataposewifodasef.pdf
    • http://geredekombiservisi.com/userfiles/file/94769372191.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb820c6927---nakewedaw.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8jai0tf7ahd8e18dcl4q1s1ps4/28704328164.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e72a0a1c7---vosezem.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e617b8b764f---bopexirifetuxularukule.pdf
    • https://cgeminfos.ma/upload/file/88924577735.pdf
    • https://africanresearchcenter.com/userfiles/file/1214479597.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/4568b9b749afe6bf8bbea90e2e097fb1/fijuzarar.pdf
    • http://deltastal.ru/userfiles/file/nodizip.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7aae38d75---70766290909.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607625e988118---fefun.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdcb0bb70f---xuzedom.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/86a5db44f5d6a3553e1b7cbdc7e6097b/6019585395.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=fastest+racehorse+ever
    • 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_off0001c546.bin
b9fceb3bbb02392677dabaa3d423dca57f962bff5627cf1798f8f8ffbcc6a6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C546 19048 bytes
font_01_sfnt_off0001f717.bin
2b1c784dd35d9cd47e532ed0e60a6d45808fc56483ec77eec386289c639b07d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F717 5344 bytes
font_02_sfnt_off00020a62.bin
cccf70cb64f35fc68df80f57f135b39b88b6bd67be65bea7c501d107b2b46dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20A62 10128 bytes
font_03_sfnt_off00022134.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22134 16792 bytes

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