Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc23910a7ad7394…

MALICIOUS

PDF

808.6 KB Created: 2021-07-02 09:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80cc43179a3579c747ab9ba41979f0e3 SHA-1: 49bd0c4598936f97701b0bf868b00ea525e9bb6f SHA-256: 8fc23910a7ad7394953e1e22c99bece0d5da98ff55c639977e1250c314dbd362
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates this PDF is designed as an advance-fee scam, likely involving fake lottery winnings or parcel deliveries. The numerous embedded URLs pointing to compromised CMS upload storage further support the malicious intent, suggesting these are used to host or distribute malicious payloads. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4567

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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c31f7c0a8f---kijozifavadekudikuv.pdf
    • http://slsnn.ru/content/file/tolewuxir.pdf
    • http://kolasinprevoz.rs/slike/files/12100258083.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607259d6b6f3e---60017549912.pdf
    • http://richmediahouse.com/admin/uploads/file/bisidudaxet.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b8372ef92a6f7a4e2520f346eebfb291/65582490023.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cd488682e---7648822065.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/4b85acaeff118bb88d279851227b93c1/4825125305.pdf
    • http://dgjst.com/upfile/file/40186726920.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b446125b6ef8152b59cb35248e306bcc/nizaxalorewokazumemufekir.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d867a063a03---57586051437.pdf
    • https://magatek.com/documents/file/44076128017.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/dec79a24cbc339d6449d9a8d5235bf22/zuwekabasoxipamumup.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be22d8cb97e---89160176579.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/r0aq1t8g1lmnr0r1sup89ejfuf/mukotezokujuduxa.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16096412bca575---komazaboradubi.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44083434d---70953371453.pdf
    • http://goodwill.as/userfiles/file/pogitufanesurovusisav.pdf
    • https://honghow.com/ckfinder/userfiles/files/sarololilidifebifavuzo.pdf
    • https://baxsporthorses.nl/userfiles/file/jenejurizuragew.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/68c12b6b35d1667e988d1154a2c39527/78197804798.pdf
    • https://profipreklady.cz/www/ckfinder/userfiles/files/41984043435.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b06850f3eb3---36266748627.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca7e8021e5b---dapovemilopujivasokami.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985169337e9---80869465838.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a8f469eb7---89764213402.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+many+teaspoons+are+in+cup
    • 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_off000c2eaa.bin
e497ecde6962ed4d89be379817a394a073fa2e22de32aa27bc667a6cad4f0a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EAA 18464 bytes
font_01_sfnt_off000c5fcd.bin
1f663a18112d2e50c40cd2d4b9c3cb00cb34f0cd53459341cd0ad813e8a2cacd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FCD 10780 bytes
font_02_sfnt_off000c78c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC78C1 16792 bytes

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