Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea275ac57c1a5f1…

MALICIOUS

PDF

83.9 KB Created: 2021-06-18 22:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 46613930ec933ff062f5cb6ce0c1265f SHA-1: ad64e4a07fc1373f9183117bd7d9e56d42b4fcbc SHA-256: 0ea275ac57c1a5f15c338c83c5ea2ad13927223ffb68a5cbf30a8bbe86966e3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to 'Wordpress website development proposal doc', indicating a pretext for the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/c38a0f7b6cb6d98f32230c39d653a3ca/28085836022.pdf In PDF document text
    • http://rockpapersun.com/upload_mce_image/file/pusotebajaseginorata.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/nuguvuzib.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/vivilulivu.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b07894232b8---39511051851.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/pjj7s4sa9hm2jkieqjod3o8nl4/tosileduz.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/f339hk15htrmakap0ej8vah9c5/56868943266.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/kutasepemepanuzonumodiru.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6eeeca603b14f69fc0d950f1536675b9/xekaxusepuf.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/milatepitoruti.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a471cf81cf9---gexusafakuremovopafawa.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/38ns2t3jho0s7vregbg3f7if04/40690344709.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a418fadc2a6---96019993052.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/f0u7hmcqclc1pggic95jj3qtj6/72577929578.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/36167821444.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/75591d72ec989a5c0893146cbba074a9/18516010962.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/d09f0e94fda81018c6a8df98b625eae4/lelodabaxaleravurokanukuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=wordpress+website+development+proposal+docPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 5524 bytes
SHA-256: e985af7739733041d16fa341d8cfe89585cf91360a97582281e5dcbf528e538e
font_01_sfnt_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 7100 bytes
SHA-256: 13362c0e69564470d2bf0ad547ae856bec60219464220886dad1651d276c2bab
font_02_sfnt_off00011673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11673 10608 bytes
SHA-256: e201729c1e792138a38c0a293d85e6cef775d320e27cfbb6ded2b79e0d6fa37d
font_03_sfnt_off00013a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A49 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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