Malicious PDF — malware analysis report

Static analysis result for SHA-256 24703bdaded89f75…

MALICIOUS

PDF

80.6 KB Created: 2021-09-02 14:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f0494415023853c3e09ed800d5e1df94 SHA-1: fe7bcd85682f3c2dc61f0d51f2b387f953e6756e SHA-256: 24703bdaded89f75ca584252d4f60920903646b9b63444df46159c872fea9a69
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 websites or are part of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting and compromised CMS uploads suggests an effort to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dungcubepgiangtrinh.com/webroot/img/files/zerajam.pdf In PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/vupuponurabejagebigi.pdfIn PDF document text
    • http://goref.ru/files/file/66616302513.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/bb9b1d19758ac7a68e72f7781ae5bcd2/73820693022.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/atrgajdo7heu6olcbc1t2rvkaj/sarisatipiguvomujudit.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/gudizunugepamijomulidiwi.pdfIn PDF document text
    • http://salwex.hu/file/15697143409.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4342632e74---56500267547.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/xowepamozufiwozitosinuj.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916db79ce72---26531516238.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/wavenumiwefisokepezu.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/0c7f56ae346198de3d9c2f2f35b82dc9/20624371285.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/evm2marhbgsgucsdkptcp1965n/54961285703.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/22776942193.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/gonufe.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/dd90822ebe285ac11f065e83066e1b39/83785337634.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/kisetepuzux.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/e4291dc42d8a4610214e7fc9ea3104d8/fegoxesifipapatib.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/82783575605.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/direwemifapeja.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/49f030c3481485c2fdd29adb1511169e/60784875234.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=polycythemia+causes+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD236 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 10896 bytes
SHA-256: 708ad310a64f699bdc3ff5e22534fd1082d12d9d9c407b144c2f71343deb2125
font_02_sfnt_off00010395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10395 18752 bytes
SHA-256: f38f1c5b51fe3700896152de84170097d81fad171d22e490a8a874e645754e15

Open this report in the interactive analyzer, or submit your own file for analysis.