Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe39ee217966d4b…

MALICIOUS

PDF

126.0 KB Created: 2021-06-27 22:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2f43f4e747477cb062f8f3bad33185d4 SHA-1: c4a5ccd77b40f290cfa1c40f3feff51590e61f58 SHA-256: abe39ee217966d4bafe53f4a6d571e872b7bcde2ee7501dfa718e5326e2d98f8
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links and the hosting on potentially compromised infrastructure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b624fa11b8e---bijovanasijalakuxu.pdf In PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0dfb9318f2becceb763987a9c5057b6e/xomapetumikajafikadazixaf.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/votajalesubezumupagifegel.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210618051223963.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/wovukiduvisabazetoxug.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/eae10351ceeabbba878b3e9caa5cfd7a/1726099743.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070976776b70---giwelovekazuzamibef.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/44192a6b80afa18fadae6b3309321156/46392740840.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab78a7bff6d---96985686010.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16244651528961.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/xesajumuporonesigoxeje.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/mivegedamisexakefa.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160833b9a24a5c---25685828784.pdfIn PDF document text
    • http://dnepropress.net/files/file/95292681258.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160becfa6654db---18595253641.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089899b1ee77---42551742071.pdfIn PDF document text
    • http://amandamaitland.com/images/file/12019409454.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/93d3674ecea3781b7af68cec89852527/87504649051.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a20e3bcf6a9---2720868556.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/f252a0cfb507c970339c2e66dd1cbeaa/89102420730.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b4114d23a97529b8bcd6fdc30d8109dc/pawezo.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608058ce58920---notivaletixemese.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+model+of+a+sea+of+electrons+helps+explainPDF 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_off0001848b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1848B 10948 bytes
SHA-256: fb11817c4e0afc51df4adfdb21cd92188d4885b010ae628e689cf886187f40d1
font_01_sfnt_off00019dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5D4 19692 bytes
SHA-256: 348c4ff7f07ea4113bf9496b1dd79b0a2539f8374d4702d4e2451bd31a0c618b

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