Malicious PDF — malware analysis report

Static analysis result for SHA-256 1117d64c05ae5e3c…

MALICIOUS

PDF

103.9 KB Created: 2021-06-27 11:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ee16b9508c8e17452f07ed1eac7e935 SHA-1: 5cd5e52fce7bce0b7cc5082759bae430a0814341 SHA-256: 1117d64c05ae5e3c87ea6a93dede0b4abf367619a524868c3723486eb2d655fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting it is designed to lead users to malicious content or phishing pages. The presence of external URI links and link farm characteristics indicates a likely attempt to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://nomylo.ru/uplcv?utm_term=backup+disaster+recovery
    • http://eperon-kochersberg.com/img_db/21483208754.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6bb3b1c1b---zawufun.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/p5qe0locforsaga3fcar6l71vc/90724308263.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a7aef24937f627fbfffd6b63d5ced971/kojudirixiviwi.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ebaa26f64---sukiwakejuruk.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e53af5aaf3---94189616331.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160ad859b72c76---86922598879.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc10f7494a---63883898283.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bec61d0753---xofitimetidor.pdf
    • http://geo-equipe.it/userfiles/files/gidibusewir.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kabuduximobebukotudov.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/65172bd232d449a152325c3559cbb660/luvakukanopalaramutokuguj.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/deed9c1487cb4d0fca33fce76d62428b/xefawej.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/r69bp93a6dec1eh8rd7l0jm813/8830617406.pdf
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/78260907926.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070a2159a894---70426975819.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b390cf796---sunobixetesagozis.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a554b9b6a---rivonaxoxom.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/d1bc756a68aca9bf7a0272b641344455/liseroliwefu.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607576cb6ae26---78000341452.pdf
    • https://adasms.fr/userfiles/file/giguxowibizapub.pdf
    • http://shsclassof1970.org/clients/872719/File/19454521168.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/06a37e4fa63a79a507e231fd69e4b3ff/xoxon.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a30617846d6---vuresujorajosawenu.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_off00013383.bin
51171c06203a17af05e8d0e8391c52bfe60a33ca4357843929e814648eecb4aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13383 17480 bytes
font_01_sfnt_off00016178.bin
68d5ab0778721cf09e1a3d145e6198764250ac82de0832a4633ddd256538736b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16178 10780 bytes
font_02_sfnt_off00017a97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A97 16792 bytes

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