Malicious PDF — malware analysis report

Static analysis result for SHA-256 008faf3fb45c7d79…

MALICIOUS

PDF

86.0 KB Created: 2021-06-28 11:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c3a169dc5c925af778b62cc4ea46bd2 SHA-1: a5f20f629c220235565276d678e430f4b872f2a1 SHA-256: 008faf3fb45c7d79a70474370206b48317883f26d66c0340bbd55544a5973aa2
156 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing lure, employing a link farm hosted on compromised websites to direct users to potentially malicious content. The presence of multiple links pointing to PDF files on various domains, some of which are associated with compromised CMS uploads, strongly suggests an attempt to distribute further malware or conduct phishing operations. The ML classifier and ClamAV detection further corroborate the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://festival.bg/fckeditorfiles/file/96697112004.pdf
    • http://hawks79.com/clients/85064/File/rufesufulipoxemeriv.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/4a1259b17a5e83b59b6719454185dce9/vijite.pdf
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/wixikitesirozipiw.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/12d386c6e831c5e156473f16bbfaa236/22786041681.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bfc9d24168f---15296916475.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c96da2705b6---goloduwiwigagezuzokun.pdf
    • https://cuisinescartier.ca/upload/editor/file/3852033131.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082575b795fa---28870173966.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787ec64952e---13205267837.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cf982375a---65728844081.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/18kkvsk8br08pm31fr2qh8d1ss/zefido.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091f626e7124---kakopurulesa.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9ca6afc7c7e431f6fef4c7caafc4a31a/xinixokisexopijonazibe.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929d8e24dcb---8969832534.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/2e2b3cfce791f35aab18dae142e916cd/jetexin.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fbb01de0d---87520463622.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/89878831736.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29f48bf098---29853254526.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ff54bbb4e---zowosovajusixerajilidum.pdf
    • http://bio86.fr/fichiers/3264446124.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/7f098296afc061bcc6f45d5ef172ad4a/dakosate.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ms+office+2019+professional+plus+download+iso
    • 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_off0000ed7c.bin
1d913d51e8e521a47f28bf6fd42d427ea477ab7b476d864850f53e81c5b986cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7C 16388 bytes
font_01_sfnt_off00011829.bin
4ac759ac5eeea3eed09b0afdd1a6ad6397ebbf1d5478dcda7ed34f16127ec319
pdf-font-stream PDF embedded font (sfnt) at offset 0x11829 11156 bytes
font_02_sfnt_off00013283.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13283 16792 bytes