Malicious PDF — malware analysis report

Static analysis result for SHA-256 967b5a61eae83998…

MALICIOUS

PDF

90.9 KB Created: 2021-06-28 03:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a85e51ea7e5fd9b12d57af36b7ad6486 SHA-1: 061dfaad54312c692d3dcba7bbe9d08cac591fb0 SHA-256: 967b5a61eae839986892bbe17a6f07fa0702e805e050dc9e615a58ab4c6ac8ec
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of numerous distinct hosts and the use of UTM parameters suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hogies.com/includes/template/uploads/file/86797837045.pdf
    • https://ghnservizi.com/file/bagopozipexeguwaxut.pdf
    • http://asfus.net/virgsurv/userfiles/file/97369211344.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/c5680194333a7fc7d3e7bc4dd57b17d7/pajofusot.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b953c2749---bidinazorikiziru.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/4cb0cc6529bcc9c7ebc9bb49095b89b9/79790606088.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c62f36ea---totujatugudepufubaralul.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16075493c09869---22099159075.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/xibinutot.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cfd85550d---kufetuzutusutaxuguvesugif.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/2d6b8a1a97dfd63fbf915e68b1b4df02/44389326048.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2db85990c8---44832744681.pdf
    • http://cabinet-blin.fr/ressource/site-image/files/fobajudowokutevoninasur.pdf
    • http://lagostena.it/userfiles/files/622182246.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/df736a86adb441f2a7b05d5067fb0e75/90549167734.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609439a8a3991---11898690870.pdf
    • https://advance-pack.com/editor_upload/file/dugudufonelademikalusibaw.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/af8269ba5054dfe9effd2e354ceaf477/tipemifigatudij.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607974f07aaed---tavegizezexetoridimi.pdf
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/90586982458.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae53781cfed---30738534128.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e13f16e34b---30489966732.pdf
    • https://ceccarbotosani.ro/userfiles/file/63098247102.pdf
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16205871418303.pdf
    • http://www.bluewhaleline.com/image/upload/File/38806948293.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=jcpenney+store+closings+list
    • 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_off0000ffb8.bin
ae301aa2317b77253043abee0c2a3a02d8d60e40f32a6c8959bd577f6df3e30c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB8 10492 bytes
font_01_sfnt_off000117bc.bin
9694c4022249835fd54cdcb53850d5a39293b2b51331732e920a2aa0f51735ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117BC 17656 bytes
font_02_sfnt_off00014640.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14640 16792 bytes

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