Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd929e6e7605252…

MALICIOUS

PDF

135.3 KB Created: 2021-07-08 03:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a397271347e469a3cf2ae38551e5b72 SHA-1: fb2ef146440d6c2838a86102a242b5ff625c559e SHA-256: 0fd929e6e760525272ef3d20df35a2a62836a633a47b7a96b67ea0ea4e61d932
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of multiple distinct hosts and the use of UTM parameters suggest an effort to obscure the true destination and potentially track user interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://archism.ru/uplcv?utm_term=ecosys+fs+3920dn+user+manual PDF link annotation
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/os3dq3rrutbkr9ims7uug8iho7/42702672579.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095445e494a6---22901355384.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/19519722814.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/46075333305.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b89ae7b8cf---tabolodegujilowu.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/37299464779.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/7d00bd6661eead24ac6b3cfde9cacc0e/10525795496.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/50954314843.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/77578831940.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/28f1b232fe2dc06fca818f40c0d7ab64/lenipewemokuruvego.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/77020a9c8143364e08120fae761b3145/vonukowiwonixas.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e8a9d31c7810e2786c0058c9edf3b971/xipox.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/m9lrhnnrtvnbfp3vb6p2tqo35e/ropawonawema.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/7441093308.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/dolejuwixelaxibesa.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4382934e0d9958a00bc86f3e4eb33c33/82360664325.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/wikikonufutajaxerojogev.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fe977a515---41831931787.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/ab4d4bb10ed89d75a983b8f2e5706bd6/35496864215.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a75b22a345e---71845188700.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e33ded92a4---40245643237.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/o7m357bg3i2amqeuciql5c33f5/86543165811.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/puwikuvovakakefomuxap.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A86B 20308 bytes
SHA-256: d381f87640ce57d137c69500a4d7dd0807c2190e42d4f48c18a2ea5ca2f3dd75
font_01_sfnt_off0001dd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F572 11228 bytes
SHA-256: ea57d12ec2eb8a9dc6b30fb7f0893dbe0bcb3b643ec605af6fc3d293298ddb72

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