Malicious PDF — malware analysis report

Static analysis result for SHA-256 047245050b6f0a4e…

MALICIOUS

PDF

85.0 KB Created: 2021-09-06 14:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cd7e78836fc928890407d46c2e01049 SHA-1: fcdeb8e83a68d6ccd4a1f82ce83fde2239f862f9 SHA-256: 047245050b6f0a4ebb885cf3ee9b3e11ac5c70b31b4e05c9c679610ad2b588db
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities or contains malicious content. It functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. This suggests an attempt to distribute malware or phish for credentials through these redirected links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.hangmandigital.com/files/file/17944249096.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9c44e8b1---femojoni.pdf
    • http://apsara.ru/userfiles/file/18542842656.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91a392229---47700887909.pdf
    • http://mottaing.eu/userfiles/files/32922225450.pdf
    • http://djk-winkel.de/images/uploads/file/14999090498.pdf
    • https://mygenius.ru/admin/ckfinder/userfiles/files/80435903220.pdf
    • http://pogotowienaukowe.com/Upload/file/10590456521.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/a26b081a7c0d8dfe8876c3d06cd1b1d0/wagibotizewisir.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d3eea76b1d---faliwubes.pdf
    • https://babetravelling.com/ckfinder/userfiles2/files/71703327382.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/4bcbce0f2ddd48cba21a69918b18d868/pixakonigodimonedowaki.pdf
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/kiboniseve.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e5e54a71a---kuxofufiselu.pdf
    • http://kaies.net/upfiles/file/48383647708.pdf
    • http://eraldocomo.it/userfiles/files/tejawalifufeg.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/06e11d0u32j4f7mkt6q6p1rfn1/1653194545.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/2a1466123994c77d01b21cfb1d48ef41/67130021528.pdf
    • https://bilalyapidekorasyon.com/userfiles/file/83857049155.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1bfc8ac8---76305196150.pdf
    • http://stellamaris.cz/userfiles/81197071350.pdf
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/1576530551.pdf
    • https://moto-trend.cz/public/files/fck/file/35593716410.pdf
    • http://anhbanglaw.com/userfiles/file/bosegur.pdf
    • https://ikansambel.com/contents/files/xajivufa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=stereochemistry+of+organic+compounds+wiley+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_off0000e086.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE086 16792 bytes
font_01_sfnt_off0000f898.bin
31c61a5d9107def026e2ae51e77017e6f6c373e288116454283950f4017e888a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF898 19528 bytes
font_02_sfnt_off00012b89.bin
e92606489cad828b33b9a0e9a186af9ad9bf656ff962b273596d180d9ee74f64
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B89 11444 bytes