Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe89cfa26a42dccd…

MALICIOUS

PDF

102.0 KB Created: 2021-07-02 21:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9ad38bbe59564571ff2a68f3da57d622 SHA-1: 212ff45f2013650637c0e546ce9bcde84a5cbd0c SHA-256: fe89cfa26a42dccd43a648b37a8b3fabf02413e3b1ad05e095a781edc5a7b543
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, specifically targeting their file upload functionalities. This suggests the document is designed as a lure, likely to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of embedded URLs points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27fee15647---50602620503.pdf In PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61c7cdc6ef---filolifuvidujalow.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/c1d1672dd8faaad02daff54fc60e294f/vaxikuwabubafobufu.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/3aada60f3081c207c0ad66842d890d52/saxatiperes.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/gogusexonasovubilinugep.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/43940554718.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/motuwudisenugigev.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/nfd79ahiqfbhb5gb47lh8vij16/4353004850.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/cdb19a09b23835bbf0b2bda2ae55bb30/mimudolapumas.pdfIn PDF document text
    • http://lucann.com/Upload/file/direbe.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf63d22edfa---18578055019.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73af12e98d---53549736385.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02b77562c6---8951601500.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/digifadifoj.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/54505999191.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/86137139309.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/6f98c0c81941e24c5d303496bd5155ea/binatukepojifofimaxiraja.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a44d312c6---fuxibukatejapubilefunidep.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/visozabunuvi.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/8to9lc6lm6eg33k3g18a16hjjl/nulodabibu.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/a68ehpd2g70a2sfktrgse62k06/dodufuveka.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/83984907127.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/6bb440d0e3cbd594ccf4739986863931/fomimaj.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093a4b53d84e---duturorekimipotevomaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+pirate+bay+100PDF 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_off00012d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D42 17312 bytes
SHA-256: 650b8d87c42e9347ccd5e23d07d244304c10d6cf5740767464765319a7052820
font_01_sfnt_off00015a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001723e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1723E 10304 bytes
SHA-256: af925e348104a1020a5f7878c95aec9b8e7f62fd6b2bb4dd58944b3ee282acfd

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