Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f2538490b2b52c…

MALICIOUS

PDF

71.0 KB Created: 2021-09-04 10:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 31b0d7bca77bfd5a18ed3058c4ffbdf2 SHA-1: a9358b26a7c7e1bc9a9bfa54ea18be4409196b20 SHA-256: 70f2538490b2b52cdd8725e0638aadd37a299142b5480ba1e737f2f1455f4f83
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple websites, many of which are hosted on compromised WordPress installations. This behavior is indicative of a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608224a87d163---sevolufotagonetalibowexim.pdf In PDF document text
    • http://sicompk.com/survey/userfiles/files/13517471947.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/8d481kc79g0djh85tpanbj3seb/94763191008.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/dapuzijubolupep.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609840c809f69---bapefudezowa.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/jufaruwupebego.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/7fbb4d14021ad0bbbde59f1488a29140/pesepuputinesorapu.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/69573940684.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/94531674910.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/41903144975.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/46e392187cb8e78fe4913f15d58001ec/nuwogijugojibejomedipoxa.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116e66dec440---92973797510.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/77488984861.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/405d9b9706613ed4f842b882d9384976/32824626257.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/99520019112.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/77697131608.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/lufopagavabuluwukezazor.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/34333218339.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021629195038437.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/nagivodisofofuf.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071747de456a---fixof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=binary+to+denary+worksheetPDF 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

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_off0000b4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD05 10644 bytes
SHA-256: 7e6e3250ca74b156af4da306f6327543a35dcf5fb337f3efbea1c27c067d29a2
font_02_sfnt_off0000e571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE571 16156 bytes
SHA-256: 2a9cf22402bc59789e2e4775bd6bfacea97e4db6fb8375ecf63297edfdd35db2

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