Malicious PDF — malware analysis report

Static analysis result for SHA-256 9260780a370815da…

MALICIOUS

PDF

91.1 KB Created: 2021-09-13 02:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a3b56e458dfa7bcda24e96f098e0da8 SHA-1: 2465d2a920ae194921167ff26b8982a22669fc66 SHA-256: 9260780a370815da477371268abe5da7202da5ecaa81f1ce69bb3f31405d2fac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites 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. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://infrive.ru/uplcv?utm_term=grimoire+of+santa+muerte+free+pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d55d520c288a8f725416ac447fbf1098/kebejuluxajafikusovu.pdf
    • http://yuanyoujie.vip/userfiles/file/kifesiba.pdf
    • https://nwdglobal.com/ckfinder/userfiles/files/54236051978.pdf
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/fawuneru.pdf
    • http://ginzaoakland.com/uploads/files/pukoruferavituzasofuzosex.pdf
    • http://veterinariacomportamentale.it/userfiles/files/vizuba.pdf
    • https://maturana.cl/upload/file/dapolel.pdf
    • http://clinicaveterinariabilancino.it/userfiles/files/sedobazop.pdf
    • http://estatepie.com/files/userfiles/file/falujinopipomid.pdf
    • http://dzirerealtors.com/uploads/79345352052.pdf
    • http://globalsublimation.net/uploadfile/files/toxalerivu.pdf
    • https://parlagame.net/calisma2/files/uploads/95644480873.pdf
    • http://studioguatta.it/userfiles/files/74426440137.pdf
    • https://elsadaulte.com/ckfinder/userfiles/files/54224838882.pdf
    • http://gorod-r.com/userfiles/file/fadumujada.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cab6cc7bcc---61846860505.pdf
    • http://veitali.com/upload/files/47470680014.pdf
    • https://festival.bg/fckeditorfiles/file/pikuxojewawifokijarerew.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161381b6d39532---fikufuje.pdf
    • http://pillshop.ru/uimg/files/50231043984.pdf
    • http://statsale.com/data/upload/ck/files/mogozobuduz.pdf
    • 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_off0000fdf1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 16792 bytes
font_01_sfnt_off00011608.bin
ffaadf96c47fa0d8185ce632878b038f6c0eb40eab5969785eb44aa5b18971d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11608 10752 bytes
font_02_sfnt_off00012ec4.bin
4a47e976211c6d032139da2dd3287c2f8e7d2c6dd2bc820df23bf741f579c955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC4 18876 bytes

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