Malicious PDF — malware analysis report

Static analysis result for SHA-256 6574e44cb62d9ec7…

MALICIOUS

PDF

89.3 KB Created: 2021-09-18 22:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 66a5f6908faff956cb5aae30cd01ab48 SHA-1: b32e313bf67d738eb3b5dad4a502bcee98192be9 SHA-256: 6574e44cb62d9ec7628e6a491c0e7d3e91249ed196e8de46c46de9d5511e667a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are probably used for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=cheat+codes+for+bike+in+gta+san+andreas
    • http://pampa.be/uploads/userfiles/files/ziwuvizinumozeligesavero.pdf
    • http://radio-salsa.fr/php/rs/filesupload/file/47898774115.pdf
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/18082108617.pdf
    • http://teakdeck.pl/files/file/xadoxeravi.pdf
    • http://sitarofindiamd.com/userfiles/file/lobelitasevomirokizapogi.pdf
    • http://lawyergz.net/uploadfile/files/kotofuwodapivetakarob.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfc758f7e8---vexudexadexarifozapida.pdf
    • https://inprovitbrasil.com/ckfinder/userfiles/files/58283335892.pdf
    • https://dollarplus98.com/images/upload/files/89387220243.pdf
    • http://mardeestilos.es/fotos/file/597160237.pdf
    • http://tanabuauto.com/js/upload/files/50551934369.pdf
    • http://tranhdaquydep.vn/upload/files/posovu.pdf
    • http://musclecar-taps.com/js/upload/files/82624481907.pdf
    • http://9262895.ru/ckfinder/userfiles/files/16168436218.pdf
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/19832066324.pdf
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/gewopobupidazolukivar.pdf
    • http://quimis.org/js/ckfinder/userfiles/files/80261782017.pdf
    • http://newtarrytowndeli.com/uploads/files/rasirodejejagulurirof.pdf
    • http://avs-market.ru/admin/ckfinder/userfiles/files/38449676756.pdf
    • http://gjbbang.com/userData/board/file/sutezokejiziz.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408f7381025---wowebasepelasatixas.pdf
    • http://gldbirdgel.com/user_img/files/65722942921.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/161456236d8913---rirobaporogun.pdf
    • 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_off0000f5ac.bin
4aaccfd39ed18120a0eb75dc22c40f7c45b1bc71683a564cf6e4672337201768		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 18784 bytes
font_01_sfnt_off00012604.bin
525d89d882f1467170be91562d82160bf3b6c648aa8a0b606a887251d932d049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12604 10972 bytes
font_02_sfnt_off00013f45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F45 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.