Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68006edc2b0579e…

MALICIOUS

PDF

77.3 KB Created: 2021-08-30 19:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e1af878ac93ec2d3916f17c40deca4f9 SHA-1: 110e8aa0a656bfe72689e18172b9a4ef1bfd3393 SHA-256: b68006edc2b0579eda086fc5b64f3d5a073c5cb4a570fc5ffb9017dede2a75b5
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document likely instructs the user to install a remote support tool, a common tactic for social engineering. The numerous embedded URLs pointing to potentially compromised websites and disposable hosting further support a malicious intent, likely to trick users into downloading malware disguised as remote support software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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 http://geodavidepini.it/userfiles/files/lavogasu.pdf In PDF document text
    • https://bdaudit.ro/userfiles/file/28572102483.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074007619de2---75657065252.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610a15387b290---rulejigorologo.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0548b4278---99988639682.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/faad80f71e2c31b7fc519156dc2bd4dd/14515714171.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/jdeldtqsvo331kph7t4ctbcthh/ziwimatisajogoxewe.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/guridebulejazix.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/aea26958389666bda31d00d60b1013c3/55862255654.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/bawiduxorilifobe.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/gipasu.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/xisegofuzivagozego.pdfIn PDF document text
    • http://knipia.com/userfiles/file/15584781090.pdfIn PDF document text
    • http://samromschool.com/UserFiles/file/zagosuzifepup.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/p6cfov3p3stij1v43amj57agj4/selasi.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/tibowigoj.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16071978d2a6bc---49103021740.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/jevibulomojivatufabu.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210707_061952.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/somivobepetilene.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/jenixelaxibojodixaj.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/fufedinetenetiruvajidofiw.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7611bd5774---gogagonodejefekuwisexa.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/e9dfa8e6bb2aeb0634b61083e68b0d04/53635943445.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c803c0cce5---99881070912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=manual+for+audi+a6PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 10208 bytes
SHA-256: 4f4db8fa074f2a24151dac3983058bd7fa9001118a946a5a7fc983e491e69395
font_02_sfnt_off0000f908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF908 18084 bytes
SHA-256: e81bd78b0008af0d351ce8756a0891bc48d409178b8579dc33bdaebe9e44b1a4