Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdce0b10f81f6b3…

MALICIOUS

PDF

89.8 KB Created: 2021-07-21 10:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6039e21f8c2e399b713ab0db9952b426 SHA-1: ac8e23461703807c014639a8c705f4e3e64a4b29 SHA-256: 9bdce0b10f81f6b3f9fa3eb5d41bb30fb3a319ddf5d07b005421150a7a65f08d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://farmacieitaliane.com/documenti/file/xakekagijiruxugidaxopi.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083f9ba13dad---66233032554.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a70aa87f3fc---jeborulilewugu.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3431895c26---dedejis.pdf
    • http://buddhavehicle.com/userfiles/file/87148500676.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d302dc24e---wurabejewidedo.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb11b80c95---92430299975.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf94f2dfed---zabujubigabekovexo.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/91enaoeikgnbni92tlc1qe1dim/xixumilumevigepujalafob.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/81ec74d489a4d313e6108a2a76bb7c36/83136219281.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a867c68a38e---gedefa.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae821726204---nelabeputum.pdf
    • http://fijiembajak.com/uploads/ck_uploads/files/dojari.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607486e2ee55a---46733458877.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f4f9777b7f4---23998571292.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b6dab7c97a03b7f465b8c5c8fa4e42dc/kovuvokukuponuzija.pdf
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/65109802864.pdf
    • https://davidfoleyinc.com/userfiles/file/97092615525.pdf
    • http://quatanggiabao.com/images/uploads/files/minidukiguzezodaz.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/888c0672fe65577f402e23e4cdd74c7e/rosobidokudeziguv.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4570ce7643---zikugopilozikibanixut.pdf
    • https://confidence-ist.com/ckfinder/userfiles/files/mefutekezakozadufote.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/85203a492257751c6d0bc2914e705bd5/diguzalegumubupuj.pdf
    • http://studiosantomauro.it/userfiles/files/4887383437.pdf
    • http://baominhlabors.com/upload/files/wujafulanubokuwux.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=charleys+kebab+and+grill
    • 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_off0000fd0f.bin
d7c72061e59aef8e23593b60a1a2716ff6465b48c4fa5aa934007eb6750f921c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0F 10688 bytes
font_01_sfnt_off00011547.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11547 16792 bytes
font_02_sfnt_off00012d59.bin
dd196f11cea6d6051fca6090425548ab3b30bb86253510efb4794e5e73268d5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 17140 bytes

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