Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d94c698a139f9b…

MALICIOUS

PDF

87.8 KB Created: 2021-06-27 13:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7be15e17eeaaf15782c465f7c1e25a6 SHA-1: 8ed9ba5c81db03d7cb531e647763c39c207f1c3c SHA-256: 88d94c698a139f9b04408111adc246c7b76d20359bf54309d66315291f5571be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and URL patterns are consistent with a link farm designed to funnel users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/0f0bd4accdf2686a154a4bde2afa8b26/woxuvamalav.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/aa2f27691a9cb148679095517b2668d3/disuwomodamofawivukij.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f12010589---bejugemajadamujilul.pdf
    • http://backupcenters.com/userfiles/file/penevewunikogasugud.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/o8a74un5tnheo4grnp0sbkumhu/zadesisekikefaduborebanog.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/4ed2306d6f0fc564f40dc0d92a7d2fe1/42585653974.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/5ec6bf61793e76ff8848cb7df253d81a/81423489544.pdf
    • http://curry-box-deluxe.de/userfiles/file/65690029314.pdf
    • https://majorsagilekvaros.hu/uploads/file/widusatal.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/db14bd078f89ffe31282225a4d520b77/15059508892.pdf
    • https://protradingindia.net/userfiles/file/73392605743.pdf
    • http://al-bandak.com/userfiles/file/38473591116.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/al3a80loqj3i0bh1p60a6sioj9/lulilapedoviraruduzamomob.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cdc8064b---xurigidakonusavaf.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088753e44ed7---limolavudope.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160895ef71bbad---liximilisusowin.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5566765ff---20239765011.pdf
    • http://szolnokepul.hu/userfiles/file/bajuvaxewuzidajanegov.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/61f9329294cd79b26d88102e5a24843c/18023414876.pdf
    • https://blindnow.com/userfiles/file/9915118944.pdf
    • http://outspokenholland.com/userfiles/fckFile/20210613220102.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06469e663a---80281244230.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b8953ebca3215971fbdd95e382a5cd8d/mafapomavafabeja.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e18feccf9ab302dddfc35d02999fb8a4/mawalipemedekotom.pdf
    • http://msinziniering.com/userfiles/file/gemodokinogoremaxiso.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+white+house+nyc
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f410.bin
c12d936d6d7574aa3c921f07df20fc3fa7480c31adf093002b9f75338bb8194d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 10284 bytes
font_01_sfnt_off00010b52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B52 16792 bytes
font_02_sfnt_off00012364.bin
3d8a20f4803d786b8c627b8aa6443826f838965521be25a250e90b5131fbd1b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12364 17944 bytes

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