Malicious PDF — malware analysis report

Static analysis result for SHA-256 618d7e8a63ec2e5e…

MALICIOUS

PDF

86.5 KB Created: 2021-09-20 22:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8516cc05c38459c24362bf9092342bd6 SHA-1: e0103684cfc3c488e2430c7a6fcc5a1188209d59 SHA-256: 618d7e8a63ec2e5e5ac9ad4918977075dd609e063e3594ca7122ac6e89e53e66
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution disguised as downloads. No scripts were extracted, but the overall structure and URL analysis point to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=gta+san+andreas+mod+obb+file+download PDF link annotation
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/11902970835.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/81838679629.pdfIn PDF document text
    • https://giaiphapthietke.vn/media/file/files/fopiv.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcdf50b663---dewetuzejo.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142f5aeaf3bd---zuzepirutewojupokexa.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/nokusojelatabaj.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/mogituwu.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613528aa74760---febuwategalewifugurep.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614548f97de42---32638277884.pdfIn PDF document text
    • http://klpa.net/userData/board/file/93851800068.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/taderuvalixas.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/48174288669.pdfIn PDF document text
    • http://chineseclothingonline.net/File/76544200032.pdfIn PDF document text
    • http://grandfiltr.com/files/file/79536257157.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210910030526.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/sapaluvadorex.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/57577244345.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec2afa2a49---bulunesesi.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/gabojulometinezumuxegata.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/63392409610.pdfIn PDF document text
    • http://showdoimovel.com/files/files/72823163151.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413bfc83526---2103493856.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/rnjkvkdml52bl9ki1l7lqk5ug1/22549820892.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/77341485495.pdfIn PDF document text
    • 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_off0000ec76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 10780 bytes
SHA-256: d6f1d0e8ae400a54958807b06b0e2e3bab76b38da6cc11f979146081d8be8299
font_01_sfnt_off00010552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10552 18100 bytes
SHA-256: c8fd297f39372ae01deb634fbf43747aa9b23f6d1380455edadde10b5ccde209
font_02_sfnt_off000133ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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