Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac2998b9cab7ed8…

MALICIOUS

PDF

116.9 KB Created: 2021-06-28 20:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 64e420ebf90bf58a8bfb76251666e559 SHA-1: 942296481032b16877770d5df082082bafc860e9 SHA-256: cac2998b9cab7ed899bf0663b274ea9e98c499f5da6b3d1f92767ca007c71b93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16080b693ec5f5---xusujado.pdf In PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/kuzopezakewubagovojiz.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/xawiwonekosuboxofobepexes.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c036c2ddc6d---pogotobe.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/880d13e8a89e7e1b0a02084b173fe65b/6072205061.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/65611193470.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/8889261576.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/18f5786cd758ee80522b57939724b2ff/biwikupusibu.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/28f17320c79008558a756d84910f957b/79879370634.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/ef0207126b37c6957c613ddf40b5b85e/mosixesosi.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e236fb5d0addd03ee6c29a7396e763cd/rugotomasuloluxopejivo.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/aab7fbee3fc42c45daeb92cf93f4b358/sefezupupuja.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc171f315f5---sewojusemopisoz.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd2de08af---zemilu.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f27ebdf400---70670295594.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/qg2h08v68ge9os1ei7ilqd6sai/71149070144.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/labonunuziwimikakemovo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/rmbsc6uueebrg1b4utirh27ges/60887042324.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/gejomozofa.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092887e1459c---85127851545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=kid+cudi+man+on+the+moon+2+album+downloadPDF 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_off000162dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162DC 19808 bytes
SHA-256: b71e2401d5ff7d407fa9473a8e49e09ae7f1b56b2dd5369cc553c87fa78ae04e
font_01_sfnt_off000195a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195A7 10804 bytes
SHA-256: 7540e1b100d4e424adb05e7f22df9db1b249a3236293c84d656eb1b51bbe2b7c
font_02_sfnt_off0001ae6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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