Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e01615559b8c17c…

MALICIOUS

PDF

85.2 KB Created: 2021-07-16 04:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07abe785a45a087b80de5024a1d69894 SHA-1: 4f2dbe512747d7077ec305808c9ed8b65565755b SHA-256: 0e01615559b8c17c80b1f8dc71408e7d2897909db4f14d0372107b9ec1652d58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The file's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://pistant.ru/uplcv?utm_term=no+doubt+in+a+sentence
    • https://roweryelectra.eu/app/webroot/uploads/file/1620801911627.pdf
    • https://tlproduct.com/userfiles/file/lejajaxugiredajemamemusem.pdf
    • http://triatlonbizuterie.cz/sites/default/files/file/sevadedelowuluzel.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/vosofujutatewipax.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16077a6807c1f9---74130859322.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/lmp2n29p5ese2tfoteeooqrfv0/26919717709.pdf
    • http://shipsupply.ru/userfiles/files/wozulo.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609da110cd86a---71650451883.pdf
    • http://pronobile.de/catalog/file/vapijuxejifa.pdf
    • http://przedszkolenisko.pl/userfiles/file/gowisijiler.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b59c9bc134---85126203420.pdf
    • https://sinarwaja.com/account/files/30874858170.pdf
    • http://eia-edu.com/userfiles/file/lapamupovozuvawi.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/a90cb392a6face93d5da292bfb8ad55e/25952592400.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16073ee567bffe---84721567562.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fba4c3a9dd66bb8402478232ccca04da/62196013295.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757baa810d2---64427466800.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/29f6d227d111cc308caa077ac644a4f0/5176621485.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ugmkc96i3t34trk044hje0eeei/turixad.pdf
    • http://www.vikingmaterials.com/img/43570767482.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/a9ac528e0344325ec6faf953ec02d6b7/sutupabobuponekozuxad.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/64345340198.pdf
    • https://appvid.eus/userfiles/files/98063970425.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_off0000e7f9.bin
981d70134ad97373d8e91fa6b4f944f26cd41bb15a2e4316443b945eca7e848e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 18732 bytes
font_01_sfnt_off0001188c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 16792 bytes
font_02_sfnt_off000130a3.bin
5492ac37ba1e4c5504c3aa1f629313c51c5a5d4198e7d501fb40f6f5c5687c62
pdf-font-stream PDF embedded font (sfnt) at offset 0x130A3 10436 bytes