Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69e7a174ecb52f5…

MALICIOUS

PDF

78.4 KB Created: 2021-06-26 12:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16816ae14ea5d4e85aa7e65c906a8803 SHA-1: e6c19b296b6b7d19acda0fd2df658167d6479e40 SHA-256: e69e7a174ecb52f56717c2b0c0f99dede22f256b7549fb44f41e0066e427a88d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farms on potentially compromised CMS uploads further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://nomylo.ru/uplcv?utm_term=a+requirement+is
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984d74386b5---popasomipumefit.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0942418d175792006b6f249e1ca9fa0b/15358167791.pdf
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/fusasefowakorepevepog.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609838bb14bc8---69847428879.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a440d67cc40---88967666605.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/633757cfbb558dd61ff24c15cf3a5084/luweg.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/vf3dvntfq473jth7c659hous43/fedanuw.pdf
    • https://bestcoloringpages.com/userfiles/file/kinalitok.pdf
    • https://autosaloncenter.com/uploads/file/81346023283.pdf
    • https://ludifrance.fr/userfiles/file/14282707011.pdf
    • http://zabradli-znerezu.cz/userfiles/file/43141589887.pdf
    • http://djpress.pl/Image/files/80418232275.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/1026e090a04bfc271d1ef60f055d9873/51505413421.pdf
    • http://waelfawzy.com/userfiles/file/putawem.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210524210703.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nurrdghrina4jrsmagotg6dah1/70254437545.pdf
    • http://ecogestval.com/userfiles/file/47216918427.pdf
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/bobobuvevogikoxa.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608eec3f7af0a---pewelirefufogukewofumuxu.pdf
    • https://techson-cctv.com/upload/file/25192825271.pdf
    • http://appletechsolutions.com/userfiles/file/rojagel.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/drmjif32eah6at4nncc4g9glrj/xesewuxunigefematamamaliw.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_off0000d1f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F2 16792 bytes
font_01_sfnt_off0000ea04.bin
c5b5f9a27a08e035b6c7dc5b8606715690d9db8fd2703ed1b6ce4d30dc3b6e83
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA04 16972 bytes
font_02_sfnt_off000115dc.bin
d859d87029157bc086e4ea3feec8b73c82fe88bb70f9b0726ade5b6851306491
pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 10168 bytes