Malicious PDF — malware analysis report

Static analysis result for SHA-256 206a67fc43b47d3a…

MALICIOUS

PDF

74.5 KB Created: 2021-08-28 07:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5802697c633249e0a3dcf9bc86ef1e79 SHA-1: 870684a01fd32fdce7c39085964ab9b8e36a14ce SHA-256: 206a67fc43b47d3a3a14b4c6aa292ced763edf17a3c2aa95d5cc1d16c1d75b10
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or redirecting users. The numerous external links, many pointing to compromised WordPress sites or disposable hosting, strongly suggest a phishing or link-farming campaign. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alamansyria.com/userfiles/file/vawobomigukusawever.pdf In PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/joxozumufazetejotux.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/wepevolajovarexok.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/762c7315a215ed6d17b639aaae63a3b8/ferov.pdfIn PDF document text
    • http://suitianhose.com//uploadfile/files/60177214217.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/tikotirumugusetiz.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/7f280f1d3ac941eb0f9a73c23b7fbd10/fubapukasido.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ba04c0c4---tabikupe.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/41350965587.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/47633890036.pdfIn PDF document text
    • https://ilcaminodaugo.it/file/33796292086.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caeb4d3c0a---96009740543.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/5ae9bed1a307ffd2d870e7a763592413/539842965.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/zomuzerokan.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160889e0555335---besune.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/82eee22d3ca028c8f4f2668291490e1d/95500410921.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/wizobabigoxerumonuf.pdfIn PDF document text
    • https://intersat.lv/files/file/82324050431.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/49863259488.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/kawulolowovavoliwewoboba.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/8p8d26m4l4cbcvtibsquedfkat/11542672873.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb88e0dd06d---jefikogaz.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6327d01217---tiwujadiduporeg.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/xutasoxelenogifub.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/98650235735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+ketchup+projectPDF 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_off0000c2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D3 10184 bytes
SHA-256: 9433881c399d31ec7397480a84fe3feeef1de251193745ec5afc589ffb6a37d9
font_01_sfnt_off0000d9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D2 16712 bytes
SHA-256: eafd72a0438d8210ee79c00c3118a84d2e69c1ed8dd4c3f701da8e4dd62b0045
font_02_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1