Malicious PDF — malware analysis report

Static analysis result for SHA-256 e465b487c48cc350…

MALICIOUS

PDF

74.7 KB Created: 2021-09-12 02:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 94bd596d683a9197156b862ef4329617 SHA-1: c4b07fed0761504fd05832d5d4e266e33e7769be SHA-256: e465b487c48cc350f604d340830fc1a4fe9d7ba44e3284d48cc960ea013bab13
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised upload links and SEO-optimized disposable link farms points to an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://garglob.ru/uplcv?utm_term=grow+old+with+you+lyrics+daniel+padilla+lyrics PDF link annotation
    • http://tl-maskinfabrik.dk/userfiles/file/lexunababat.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/1920564324.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f81b518367---26867289146.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/56546758741.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/14240414077.pdfIn PDF document text
    • http://hflchw.com/upload/file/86855043922.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/59539708928.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090818021111904.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/65005091077.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1956cbdc4---89748019661.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac4cb61212---puxijidefew.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/25726525746.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/gunuliwoxa.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/73911586499.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613164063f1f6---gitejutone.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/60949757222.pdfIn PDF document text
    • https://istanajp2.com/contents/files/zisevuzozefexixuv.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/79980827225.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/30724117887.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/43098455462.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/71131536889.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161380a57f1bae---61084154124.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/levijesanobodoxir.pdfIn PDF document text
    • http://purel-biopharm.com/upload/files/goropidexapozutunixizedov.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/nejigawomogisek.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdb023cbc8---rikamuzore.pdfIn PDF document text
    • 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_off0000bea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 10948 bytes
SHA-256: f51cae6d92a191e2644e78cf56e75c7e5d8ec1767a075d581d632848f3e4ce0b
font_02_sfnt_off0000f026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF026 17220 bytes
SHA-256: d14097a05565c71f7e0236eb7c730eae3837bf8f9e05d85d99c38ca537978a51