Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc75713b25ca512d…

MALICIOUS

PDF

85.1 KB Created: 2021-06-25 13:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a01c451b457ff724b210c3b9c03acb7 SHA-1: 292d1b2e27703becce5919506ddcf066fd9b78e6 SHA-256: dc75713b25ca512d45f49693c1631798a90f0a7e07a99bae81dd44021676a037
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://infrive.ru/uplcv?utm_term=puppet+show+for+adults
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/630716c4b1a6bf732fa385af193870b1/fotewekipizemavika.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/101517c9d75e2f4730028edb1e971c0b/suvupoxanasorel.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ada020eda---majudadebekiwawa.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/784739a24bac790f2998b76f6d2beb47/kakotulusuxu.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/f513dbe825efd4a7f689d9e5983b5185/38842191862.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da9025392e---68297516312.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cd988b0a4---xamexuko.pdf
    • http://jrmhandling.nl/upload/file/70640471943.pdf
    • https://mamap.in/ci/userfiles/files/diwitoni.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/vrrkafdc40tn7ab4rmk1abj844/xorif.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3cfdc6f05---liromu.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f64aa80f26---89607615008.pdf
    • https://feltshoe.com/userfiles/file/16114416649.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d660e8499---62343444904.pdf
    • http://giga.sk/storage/file/misitipuwubaginubigo.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_off0000eaf5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 16792 bytes
font_01_sfnt_off0001030c.bin
95fb8799b177f07a559abaa9861f130c59571a048afb2a3bfe21b830d513e808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1030C 10588 bytes
font_02_sfnt_off00011b7d.bin
cfd9b6cc09e57837f27836990cdbfa5e3515d3c4bbd0dc4d1f54868cc2d5c566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7D 17324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.