Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ea64c67df2957f…

MALICIOUS

PDF

86.0 KB Created: 2021-09-04 12:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a9f3f12f0cba1ac6f31d2d7308bf5730 SHA-1: 309d4a0f2fa411b4b1994090395409626bd1d090 SHA-256: 96ea64c67df2957f7c81d8629b6e207e0ac536a62109144da97a8016b4a81fdf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to potentially compromised websites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the presence of multiple suspicious URLs is sufficient evidence for a phishing or SEO-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607921e21b08d---61550843472.pdf In PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ff6e25822---melap.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/maxikuv.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/21384404436.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/91457757045.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/nutiruporetumat.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/4q8bvoi16f4ftu695jh7hnb2ug/kaladibigudejatisebovelo.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/73c61aae474f46622236ecd47763ce27/73217610978.pdfIn PDF document text
    • http://sushibelovo.ru/files/nitawarajajosi.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/rojadafename.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/zasisitesawasonow.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia//files/43927949446.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/6e8e4c1ad157760e50689c96f9656ebc/91933426043.pdfIn PDF document text
    • https://forumsevens.com/images/file/pasujanaxuv.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nipanoxonazigegoxizoxik.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e81c65dcd8---lewunerowasijabavojojuluv.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202107291502275325.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/6487588324.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/90093558544.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/duxoniloligupirosofova.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/47523171505.pdfIn PDF document text
    • http://jump360.co/upload/files/20210618142608.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f6c8b33c1c---mugubumanov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pinnacle+studio+21+svensk+manualPDF 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_off0000e71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 10860 bytes
SHA-256: 8944acbdd88f17dd5362f1930de2b464cd0a3bc703198ac6396af76bc772e875
font_01_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001186b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186B 19352 bytes
SHA-256: 1cf0ab4231c8e9d6947e1a9ca374f5285c9ab9b64f94703fa2d1339a8e161c71

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