Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fbf0255d4ce624…

MALICIOUS

PDF

89.8 KB Created: 2021-09-16 05:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c473312051a75e2877461bc3a51e0853 SHA-1: 78905e3f1a6d6ad2ff4964b892a7dd0cd56f589e SHA-256: 93fbf0255d4ce6248e10c2bd5df02226dad584cf934a569799e89e2779706d79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353dd8b16b2---xurewawalorox.pdf In PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/20380119922.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/37389988241.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/62843588314.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/52983308251.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613b706c4fcc0---67554207308.pdfIn PDF document text
    • http://uhorder.com/upload/files/pubenod.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/gaxodado.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbda141aff---37584863252.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/33872449307.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/91021381114.pdfIn PDF document text
    • http://jwconsult2005.com/file_media/file_image/file/fefixemurufipezi.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/gujevugufemizu.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/mafozuzer.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/15080331531.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/58637921865.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/90537753124.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/lededetujinulusujugo.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/biwixixet.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/87447936241.pdfIn PDF document text
    • http://jiab.net/userData/board/file/41445080618.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/92013226033.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/32900428725.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/hmntrdkjrtgn0eumo35f7u1rtl/91948842642.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=tom+and+jerry+the+movie+robynPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8B 16160 bytes
SHA-256: fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4
font_01_sfnt_off0000e226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE226 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA33 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8
font_03_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 23836 bytes
SHA-256: 229af5d42f08e81ca86a0b6bd3526abd1bbe939c1969ce9b8336cf307958f954
font_04_sfnt_off00013fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE5 10712 bytes
SHA-256: 753931f84353ee91bf19f34bf1fbaf988754314e2e0fcfcca3887000993218cc

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