Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe60f5faace1009f…

MALICIOUS

PDF

92.1 KB Created: 2021-06-26 18:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7a3681d30fb0abeb168971a32e64f19 SHA-1: 1aaa4007ff6000f2a100afd76f7cd38a5f487794 SHA-256: fe60f5faace1009f0559e61fd82d4e0d94707311b41a758a5fce8ded82dcf084
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm, with many URLs pointing to compromised CMS uploads or disposable hosting. The primary attack pattern involves luring users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://castrolmintabolt.hu/images/upload/file/xunavudazipuvalovazizin.pdf
    • http://re-view.online/fckFiles/file/xofim.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cad142a1c9---giworiradugiduke.pdf
    • http://wowbond.com/upload/Fckeditor/file/vilunemosefafejuxemawe.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077b36cc2c25---20167977740.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc8eed437---kopumamudobirikowus.pdf
    • http://balogmihaly.hu/UserFiles/file/wavimenijobip.pdf
    • http://alkanboya.com/files/file///powisipupofemolonomiwupe.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160972103e1317---9448124600.pdf
    • http://fygl.net/uploads/file/310431022887.pdf
    • https://zold-kommando.hu/files/6067401716.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/bukok.pdf
    • http://constantemail.com/userfiles/file/162291402280058430604.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e26f2e0ba8---bawiluriwolajex.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/od3t152j08i9o5rvkpmq52poti/69411181162.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cac9cb51f7---feluwitimutuxikupoj.pdf
    • http://monkey-do.net/userfiles/file/17072564961.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607994c168613---45380947422.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0332716d7---desawi.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c7723f6ee72c6ccbe6bd278fa7fffa75/21523980529.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/6plrm9nc57irfpoit3rllqvb28/puxojumogixavedofejogub.pdf
    • https://sanipacific.com/attachment/file/tomunukitasame.pdf
    • https://eobliecky.sk/userfiles/file/zubewewamutanisofomotan.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795d329d0c0---xadotudojixaleretal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=yours+by+mary+robinson
    • 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_off0001057c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 16792 bytes
font_01_sfnt_off00011d8e.bin
b3af2824e222a3a3569f8bd434ab020924d5390be42dcb834203b792dacfe2d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 17484 bytes
font_02_sfnt_off00014abb.bin
e4152d625d065d34665d7117b292992acf4e7a2284f8ed9fc5eff10280084315
pdf-font-stream PDF embedded font (sfnt) at offset 0x14ABB 10328 bytes