Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e88f48c1d3b324a…

MALICIOUS

PDF

82.7 KB Created: 2021-08-12 18:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7c2fda9ad60c3ea23bbb07bac1d2e739 SHA-1: 8799830786c925380c9e9aa412b7efee01f70777 SHA-256: 0e88f48c1d3b324a875b45dcbc67cd8a19a8505c16fdfedf586a00603f75d972
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised websites and potentially malicious domains, likely to download further malicious content. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://airbays.com/userfiles/file/80204650077.pdf In PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kenalatigoragisovefe.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/segad.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fda9232688---65187448505.pdfIn PDF document text
    • https://www.espaciocultivarte.com/ckfinder/userfiles/files/79471350363.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/fupobu.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/94776866653.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609c35c00eeff---guvujisipirutu.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/sdlp6mf67sigd2elct60vchhk5/67375177462.pdfIn PDF document text
    • http://www.agot.pl/upload/file/40082492437.pdfIn PDF document text
    • http://meta-min.com/files/rivevux.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/dokaxaxo.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/98505807226.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075215883e25---xerufino.pdfIn PDF document text
    • http://pvvc.cz/files/16992881904.pdfIn PDF document text
    • http://torgoborud.org/images/file/nedujivilada.pdfIn PDF document text
    • http://airmon.hu/images/files/wibunuzusas.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/xexuladi.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c947613cf01---fisidabubotewuxinu.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a99b38c1c99---72504906524.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb64b58833---xonutinematinononi.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/90001903634.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/28037508871.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b04cf953d77---tatodinoxubip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=irregular+verbs+worksheet+for+3rd+gradePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 11044 bytes
SHA-256: 79cc94873fd8c799cb66ff9d75b8d116622b2d717e4e5ca28bbf9257c88b814a
font_02_sfnt_off000112ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FF 16360 bytes
SHA-256: 475c644ca0f4976e1dc5cfd99dc41d60b9d90a14cf3681e182711f1692678ccd

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