Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e656d6600b9738d…

MALICIOUS

PDF

94.2 KB Created: 2021-07-05 02:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a7dfcf18fce4aef56c04522635d9c6c0 SHA-1: bbb8e337fad494a7725c6f7c454202f03f4149a4 SHA-256: 1e656d6600b9738dfdc9ac1e68d7b005fdc6072d8d4f755203b8186a5255d254
196 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, pointing to compromised CMS uploads and disposable hosting, consistent with an advance-fee scam lure. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the overall structure and heuristic firings strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://nikosdimos.gr/userfiles/file/rosubofivitirulunomivid.pdf In PDF document text
    • http://sloplast.com/userfiles/files/47801017683.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608168f0e7df9---16018599003.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/jelunopewomotozadizas.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/2osuorbsb7fuiv3qqfa2ef1k6t/nalutamebux.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebf38b802e---30441200265.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/f8fcab9ced46de7dfa0099e298795e78/80000683036.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fe2f8a141---64162889035.pdfIn PDF document text
    • https://akemi.ro/hirek/file/75682461504.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/lenejazomuvalafas.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/3qcre5cmoi4311e61rabh7c88j/papuvipeligajex.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/cbeb7f82bb560d1dd666e3c3a4b662ea/28883888835.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607114cb62188---ruwavazajojazawo.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/3e69b14fcc2cadffb8ac0a2adaa1da77/zesixiron.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/26489757148.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/84679edc3ef18c816f7be8c7573ec0bf/63485370017.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b361db994b0---71482065889.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f74932f15---9614977718.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/riluxazizixas.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/xosamovotanevoniniwuko.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ed58268aa---fewup.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/85590727016.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/8be3758da98c465bde6ad735ed57ed03/45269038547.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4517cae928---dafodobelixolutowafivaxel.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792a1d8885d---87673957439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=simple+background+photoshopPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB4 17408 bytes
SHA-256: 2925aa4a0248fe4239cc8b7c6c038f04a8e849487a116b4e17795058dc0143e8
font_01_sfnt_off00013956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13956 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001516d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1516D 11368 bytes
SHA-256: 73b6ca69303c42cb1fb56699003b4a37cc88759bee10ebe25af90415708f6642

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