Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0da1aaedd780680…

MALICIOUS

PDF

168.2 KB Created: 2021-06-26 00:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c6b3075ae8e7ff683e6bbf4b5b2f4cd SHA-1: 3d1397b3f943e2a653422e598adbd2d42f0887ea SHA-256: b0da1aaedd7806800047a61ed7e292cc3fa4c11460cc3f0e032d457e505a8464
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam lure. It contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a distribution mechanism for further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://drafthe.ru/uplcv?utm_term=censorship+examples+in+fahrenheit+451
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9657b4cc93---61693769863.pdf
    • http://onlineexpert.in/userfiles/file/84539747217.pdf
    • http://vejwun.cz/images/95814813330.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/87d19e65b61b0e7e15a3cf0d9ba20dcb/dezojedetajedidiwe.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e6399dda0---53544079500.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160996ed7687d3---96265180739.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a843cfee269---logexeni.pdf
    • https://istocdukkan.com/userfiles/files/60577245828.pdf
    • https://e-fasteners.eu/media/file/logejimuga.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609e31a0b75b3---85579085847.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/pmsi4ltjl0qvent4pvekhg12d1/lekakodefolajozo.pdf
    • http://jorkurojus.com/userfiles/file/fegavibo.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/a582e8e662359580d61f9324576e1d9f/60493057210.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160871a59d0a7c---2800680637.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/cfcc9f0f5fa3955e34ee61f9f9c2f4db/78242367567.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0db4cb3d79---47513231934.pdf
    • https://anakmeong.com/contents//files/98032518872.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/bff41d17b8b4e47852042bd469e9a65c/63720981127.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/bdedc754bc81fff8ebccf1de8bd929c5/66244892695.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5094d9cc6---62539200810.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608615d2128be---91948840270.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/eb1df1565b7433380866ee9c77d23c65/koxitox.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996d72561ac---93600547036.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d2893bf1a---15340987545.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_off00023066.bin
a24c20541a9aaaca1ce8565597d053a4ff2adbc6fd93ecaccb829ca8582fe951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23066 11020 bytes
font_01_sfnt_off000249f8.bin
882c21a41a42fd19ceca8583e7dbc9d6c27477cf2817e8202853372d0ba922c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249F8 18960 bytes
font_02_sfnt_off00027b10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B10 16792 bytes

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