Malicious PDF — malware analysis report

Static analysis result for SHA-256 79220353dfdf5bea…

MALICIOUS

PDF

99.5 KB Created: 2021-08-08 06:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f36377ad577a0d7eb35b545051098724 SHA-1: d9ba8dcd3a9ad86e1908af24d64dc58270ee6a89 SHA-256: 79220353dfdf5bea1af833359cf1ad90d4da969be471a0a369e5558a309edd4c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is classified as malicious and exhibits characteristics of a payment redirection lure, suggesting it aims to trick users into believing there are changes to bank or payment instructions. The document contains numerous links to external PDFs hosted on compromised websites, likely serving as a link farm to distribute the malicious payload. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfd71193ca---48111468593.pdf In PDF document text
    • https://securitegenerale.tn/userfiles/file/zukogamunujigodedow.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/dbe52a2b8b40cc950b0c60c748174c48/pigemotenebagige.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/85eb94cd11d8cd4510e61115d6667243/30467471647.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/77164251390.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/49566900046.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777c73455fe---68088075086.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/96059370724.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21975c7f4d---womoforagaxunekokofosa.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16074b6ff40886---55274053343.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/7e0828ce03c94e0f5ef82146842ad820/duvesovefipijapefemezuso.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160743af2d6e11---nutiwuniwija.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/poludebazoluwefajusasola.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/28490159396.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072efeb72f57---22834428471.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/bepex.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9e1d1fcc6---giweduzivafibuzu.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9089d8b970---48409586812.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/e4a82eefd098ca7230a4b78933fccc5a/vejamebikebenovumazanegid.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/fezabumalunubovipoj.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/jovejebagodowudu.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/0addda8ec1ce9334e87a3c6f811e3245/78426953182.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/88278478112.pdfIn PDF document text
    • https://naoshima-habitant.com/50168178160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=hawkwood+summon+sign+not+appearingPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C78 19184 bytes
SHA-256: 6f43f567dc2f9e3143329867a01bc5772884611576f9096758790456792403de
font_01_sfnt_off00014e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001666d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1666D 10960 bytes
SHA-256: 980eddc4501d345b3db5cc0fd5fafa13d2191e31066a458696701ee4694a224b

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