Malicious PDF — malware analysis report

Static analysis result for SHA-256 1adbc72ba1875a21…

MALICIOUS

PDF

74.6 KB Created: 2021-05-20 13:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b5174b1ed8ab6b6162fae1928123bd SHA-1: a3e342549b282f4a7a621d284ef6a1f440a03760 SHA-256: 1adbc72ba1875a219924f4eac4ed75509f686d997255c5f613aad4ea71714527
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for an external URI that points to a Google feedproxy, but a more critical finding is a URI pointing directly to an IP address, which is highly suspicious. This suggests the document is designed to trick users into downloading a secondary malicious PDF, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/s7i09o4do605sdqcfe8h6q23m2/77018271581.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087983c923aa---26910490418.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/00c04caaf9e38a4af9b1ad19bacea014/77703934124.pdf
    • http://eko-inwest.eu/upload/file/39555940627.pdf
    • http://mgocsm.in/userfiles/file/repalamekurig.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cde87bd38---tikajokadal.pdf
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/2c69174eeeb47802c647e5d1ce086439/20608417867.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/jclgfp5neqgqbet915hah3a574/sesugipegu.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a481c3ea2d---5327392670.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/2fe94018fe56891bcc5135d85e2490a8/volorupipoxilotemudo.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d4a42b222---geviwagafa.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/85c95f8e0ba2f22c7bdee1d436aacc57/lurakowuvalezom.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1451660407609449a2b0d59.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+measure+lawn+mower+size
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e784.bin
3fb24dc98895e29918dbd53d6a769ffb52d581ab6b6351a03db9af20d4a9aa34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 4932 bytes
font_01_sfnt_off0000f840.bin
8f7dd2dcb4afc12037a884ac1ef1e49f506b12235c36bfc2af68dd2eeb75a2f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 10972 bytes

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