Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17ddcd2cd799a55…

MALICIOUS

PDF

80.0 KB Created: 2021-08-08 09:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3d573416c42368ee88fdeecc8b0935cf SHA-1: 878967d64bdfd2da96dc4f84e08a38d1240bd5c8 SHA-256: e17ddcd2cd799a55a4bb19d28ba5334262dee4e730f66e19c19db9e3bf24fcd1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to external resources, including compromised WordPress upload directories. This suggests the PDF is designed to lure users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://damiel.eu/userfiles/file/5072855325.pdf In PDF document text
    • https://sistemagestiondpr.co/userfiles/file/90195030100.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/55133633648.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746172e5022---64458911029.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160953c6f310d6---14617349980.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160960af788dae---84040947318.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac61a4b521---xutagowimaniso.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072467f824fa---23099958852.pdfIn PDF document text
    • http://chinalabware.es/d/files/50503609117.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9edd0c499e7eb37d385f7e3811b72f0d/meludulax.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8325b1577---vipilubukalowo.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/49911740538.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/fijadinonixozonopefejowu.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d291fa6421---33495628414.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/lodetimitodivox.pdfIn PDF document text
    • http://yuli-china.ru/d/files/60328029376.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b0c27671---12795224746.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/14274599630.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/g58024maij7f6m4e85q6erdhne/favaxonamu.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/21959178223.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/a437c2a09eb96349137b7e93cbd8a887/zadoloxulesotuwugibadop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=marriage+biodata+format+in+english+pdf+downloadPDF 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_off0000d1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DC 17380 bytes
SHA-256: fb6c5e55b67c3479d5a7483e503133d0811c4063292158ebacf012a73861a8b7
font_01_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 11164 bytes
SHA-256: 28a41eb229ae9a60f6fabecf6654f2a07577cf1697a69c880f428f0af239e811
font_02_sfnt_off000118ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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