Malicious PDF — malware analysis report

Static analysis result for SHA-256 714c108a47ccd804…

MALICIOUS

PDF

92.6 KB Created: 2021-08-21 08:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5d452c51514448fcc192435bce1d63d9 SHA-1: 08825727e424befc6e5dc9d0281b2805f3a42045 SHA-256: 714c108a47ccd80478a5a7ecf684fdd2ea4cedfb4a656a633d4d8fd3963f75a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ucity69.com/clients/861769/File/61658387090.pdf In PDF document text
    • https://infoenergie-loire.org/userfiles/file/kilupevo.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074092942a66---bilegozukev.pdfIn PDF document text
    • http://walkercombsfamilyreunion.com/clients/d/df/dfd517ab040340b2551da60fba195f5f/File/bazogaginabelutofifowar.pdfIn PDF document text
    • https://curvy.tw/upload/files/memosijite.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb4f72cdd8---96833487154.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/sonebiwuv.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/8084120727.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/91039db400304448d6f5feec4eb8ccc0/97780692292.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/11b960bfe2caef2ee4f3f6f51ab6c5c1/wapadawa.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7ede20a3---56657534359.pdfIn PDF document text
    • https://rosycaffe.com/file/2511284424.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/vobesulenijafol.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/vosukavevotomazewu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc24c3d933---wapuzorujewow.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/2eqe7uobobl4rjkonr78ov2hdn/35169365620.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/13716995544.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/68547624964.pdfIn PDF document text
    • https://giustofiori.it/file/zajafovog.pdfIn PDF document text
    • https://ckd-otto.com/contents//files/10442792912.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b91c34a898dca26d546b2a88d5c87ad0/lusuwagewuvofuxegi.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/5d6609cf35c5a0defef7a3cadd61412b/45618290314.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+twilight+saga+breaking+dawn+part+1+soundtrack+tracklistPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53A 18552 bytes
SHA-256: c94ef5b6d4bfb3e3ccbd773cca6e743bc4902a8e3a3c710a15e799f94b806c89
font_01_sfnt_off000102ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 11228 bytes
SHA-256: 9f9f844c6f27054045bc7430df05d86bfb92dd5832dd55fe492b4bf89cacaae6
font_02_sfnt_off00011cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD6 17872 bytes
SHA-256: 4bb0cf5efa3805ebe7ec16af8115922d4867b60dbbbe8e93c41b93c3747d58d1
font_03_sfnt_off00014a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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