Malicious PDF — malware analysis report

Static analysis result for SHA-256 2847643d2e0dff3b…

MALICIOUS

PDF

77.5 KB Created: 2021-09-04 23:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b7088a66aba65e34e699a161a6f18ad8 SHA-1: 4391140f02233501949949808eaac201651a95ca SHA-256: 2847643d2e0dff3b5b97e28600300f5e9fffc86eab0991bb4dd29abff6b3aece
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristics and URLs suggest a lure to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d317fa0403---gizajavovukafakelawi.pdf In PDF document text
    • http://banghetretunhien.com/media/ftp/file/84965603488.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/nexulopuvaga.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb56018c2a9---30958307021.pdfIn PDF document text
    • http://rts-3.ru/upload/files/fafibikijo.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/borasenetaroxowix.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/fubewowenikafikowuxo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c160d412b9e---jalogawasotegamesaxiwoxib.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a490b49a181---43994601353.pdfIn PDF document text
    • http://52963566.com/upload/file/202109030704061798.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/lonugomanipefuwidak.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/95352784545.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/tevazimiwofun.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/mebudasakexutoripi.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610087212ee0d---nedifodu.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ki0n3m785se3vlpbf9spruvrij/37519322519.pdfIn PDF document text
    • http://irths.com/upload_files/files/1058310508.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/gawutosadadixa.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/52681810957.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/70043492045.pdfIn PDF document text
    • http://diencongnghiepvohoang.com/uploads/files/werewilazi.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/69381379332.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/36235818714.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/jifelalakejubidutulojaje.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/rokozujofo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=sistema+de+gestion+de+calidad+iso+9000+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC956 11228 bytes
SHA-256: f6b564222356aed8663698dd04784edb5b15a8bf402e393c213c4049b5a65dec
font_01_sfnt_off0000e367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE367 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB79 17636 bytes
SHA-256: 51d47ccf235851d5f25ed3ad9e6fdd2b40fe17c80d9ea77c0149d1cbeec0f72d

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