Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c213ade577c5e4…

MALICIOUS

PDF

76.1 KB Created: 2021-06-15 15:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2067f54195f1d49554f643c92f8cb875 SHA-1: 6102cb590fab4e585eac0d35a9d92a1c96e2daf0 SHA-256: a7c213ade577c5e4ab0a415307dc778c7a1741dcf0e6da8ca8dfd94a07e17de2
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various compromised websites, including WordPress upload directories, under the guise of offering a free movie download. The presence of multiple external URIs and the use of disposable hosting suggest an attempt to distribute further malicious payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://infrive.ru/uplcv?utm_term=john+wick+3+full+movie+free+download+filmyzilla
    • https://proektasis.gr/admin/spaw2/uploads/files/19166113056.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160782a5ab0896---81578775814.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/af23f6c72ce0436a774536d83f9e6fe2/gasawur.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607731f846a6a---wuzumepujuwixatukarumem.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/434e3d1acd47a797af083d539fd3eabd/vewudazumomaj.pdf
    • https://alarouba.com/ckfinder/userfiles/files/69314541929.pdf
    • http://unsersohn.ch/images/file/59004191542.pdf
    • http://adaviestransportltd.com/userfiles/file/84390914958.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd3f29d652---morebabomenutuko.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608287718d834---12647037663.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88007eb516---zuzemisefuboguzevaw.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f5d6b9f73---wamatadavijorifekeruxulu.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afb45b051f---50523248643.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609550ba02c49---kuvubeburepixup.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/45df53db03d1ae1eecd0bf632da8c8a5/20008890284.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbc787b08f---delokadiwuzizoxujula.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/oio8gi8gs7mejhtbg0194fnan2/wanaxifo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000ea84.bin
5f89874c7f3f5f1ade633a5ca9663856e5a301084f0a146d09e806136927ce46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA84 5604 bytes
font_01_sfnt_off0000fd92.bin
24a14246750e70908fc659f1b5780d053ee20670f95e8bf4cd8e5149f0d23dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 11016 bytes

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