Malicious PDF — malware analysis report

Static analysis result for SHA-256 456768da7d0b549c…

MALICIOUS

PDF

86.9 KB Created: 2021-08-08 02:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1c3f2ac447c4d766027930a173703fc2 SHA-1: cd2799927548ed530742e2b6cad77caf9aff1f33 SHA-256: 456768da7d0b549c3b71a1e1c5b7c3eb4f0ac9abaf904d861b6c513648675c88
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of a 'download button' lure further supports a phishing or malware distribution scenario. No scripts were extracted, but the overall structure and URL patterns suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=the+maze+runner+2+full+movie+in+hindi+download+720p PDF link annotation
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160abe3d0e652c---98529986632.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/df8aedffeafc7c781029ccc6b85b1b99/vikigewonituxadagatofi.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f590b1c76f---71263977189.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/58195015548.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/zifinaweforabejafazeb.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/zunibiribazisid.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/xivafusiju.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/71893015901.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160945c519854e---43176559341.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/9f617ed2d13eaf35bfaa3e15beea6421/70677615312.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/q1q5fc7kk9nc44aqiu5ju1b97m/tologuwu.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/88209390525.pdfIn PDF document text
    • http://atek-ent.com/upload/file/7761805274.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b65ac29843245a219a744103f48b89fc/pigopuwe.pdfIn PDF document text
    • https://ibericadearmerias.com/file/xopalifesiganowikiv.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/piwedenejisufenumosaw.pdfIn PDF document text
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/dixij.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/15982880122.pdfIn PDF document text
    • http://htwy.com/upload/file/35302418017.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f602c0daf67---2521161348.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/dqdupc2k9u1o5lhtvijbilrp21/kejopuvixig.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/928f6b8bb68f4f24718bb180ac320d6e/41072959856.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 16932 bytes
SHA-256: cd7ce61d2b0fab4ca76f8d5e699cd8b10313bc8c27e95d48d48a84af6ed51ab3
font_01_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EF 11064 bytes
SHA-256: 8fb7e72cf548c2b4fb66257d457bf7115f7be40c9c210d58fe83483b44c596d4

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