Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40061c859225100…

MALICIOUS

PDF

87.0 KB Created: 2021-09-08 08:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 331edbb25c9de2d3f65f6cc8fd1e4e7a SHA-1: cc8e74f359ad428d8711a2dcc965b0605bdf17e6 SHA-256: f40061c85922510083496b27497809d34aaf3f0c173cbdb8be4ad79f12d1c23b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting, forming a link farm. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The embedded JavaScript and the nature of the URLs suggest an attempt to deliver a malicious payload, likely a downloader or stealer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=compress+pdf+document+mac PDF link annotation
    • http://zpb-maciejewski.pl/upload/fck/file/68119285877.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/e1c94838c24a5835c5cd53eee2f3a10a/69077363624.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/70948959441.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/dotowakatuxedozavulig.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/mazikijiwaje.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/88428092349.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/3d9fcf1f5be6fb857fbcb4f909d54294/97668529173.pdfIn PDF document text
    • http://rld-carbon.ru/file/50653956012.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/17830867846.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d29328abd6b---nugajixidina.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a77995238f---daxobodagop.pdfIn PDF document text
    • http://emeat.ru/var/files/72172481033.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/ddbfc6809b89ebe1d07fe70feba81f51/luwojiwasalevabepodem.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/aajfturqmv4nooarbleh1ha5g2/vamavojususonekejafozu.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/39763061647.pdfIn PDF document text
    • http://theprintfactoryvietnam.com/uploads/files/vasutafabugive.pdfIn PDF document text
    • http://ruresept.ru/files/file/kexerotev.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/07d03b71e8726434f5b6485eec549a43/nizokimujaminuf.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/6c71e389eb7d0aca77e42571feb8c691/80957026006.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0303b769---kunetudusa.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a13239ab---keloxegariko.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/sidit.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/15348025120.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001051e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051E 10776 bytes
SHA-256: e6ec55eb3662602e2dba94575dba746a2d363c52322345eb0496f565c5d5f731
font_02_sfnt_off00011df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF3 18680 bytes
SHA-256: 07722699964e63aab880f808da167cac109306cf21c96e717144fe65bc461a00

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