Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dccd5afe58a4f2a…

MALICIOUS

PDF

88.7 KB Created: 2021-07-08 11:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c07baef13fec895bc662f2632c87cb5e SHA-1: 9f4af2eeb8f839e3b8a4a1a39207fff7f170f6e8 SHA-256: 0dccd5afe58a4f2a35b71bc371e8a6a1c86361fa9695c2426dc023b011c92a1a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress installations and disposable hosting. The PDF structure and numerous external links suggest it is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/ce09eba9749850a2029f7728680dc14d/89040721639.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e7etlfgkqdnn17e0iijlcthhe/banogerelabudife.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/89ce3789c89edcb6dd8c30b1b29a42cf/piwatuneb.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/241c60a3kokad7oo3eo5nanj0f/sawatifojafarasogak.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/c0m99djb7urt1vcm5jiukosspk/58798574128.pdf
    • https://tresonance.org/uploadfiles/28458279646.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/eb3nl5men34qnhdr881vfectbg/99944509988.pdf
    • http://andlupa.com/userfiles/file/64829425366.pdf
    • http://arch-teh.com/pic/userfile/33760219900.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/394b42b8f2c72f09b8865006cb9fd9fa/nedopalefabokoparako.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/69877287231.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f3b6a4e3f---91187734406.pdf
    • http://e-skala.pl/userfiles/file/78920983153.pdf
    • http://nemdanangpho.com/uploads/2021-05-30/images/files/butofozolonowino.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/98972799420.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/3ks9a981cf5t93dgu5pe38m0aq/zazevijuviduvaforiv.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/aoblftrp5rv3l25t2jmo312989/vuvose.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b563d1ec91a---lakojupafejebifuxa.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/e35907d65cd33d8a6c63b35cb8db5e21/faxeraf.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/m7eljq60vtcc32puiicktq6qso/4579729132.pdf
    • http://apsara.ru/userfiles/file/repuwozovizibapi.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1e6a43e75---bamexagijiterawit.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab45ec15d3b---luvinemewilijunilexis.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/8tshckmoi3kqto3i3j9k96noh2/64983456332.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c94bd7da---88260034067.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e8bedbdce94edb3cf0d540fbed536cb7/995349696.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=water+succulent+propagation
    • 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_off0000f694.bin
570647aa01a3e1a5ae10c81780fe0b8eca0026e717883bb9e99a22c6f1b23821
pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10644 bytes
font_01_sfnt_off00010f13.bin
d70d241e7905846d8aa9fbf5f8107851ab71e3f154973bd187fa9ed5c13ecdb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F13 17220 bytes
font_02_sfnt_off00013b84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B84 16792 bytes