Malicious PDF — malware analysis report

Static analysis result for SHA-256 a651f5bead81ca73…

MALICIOUS

PDF

92.1 KB Created: 2021-09-13 17:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1c8490168455b6bef87649971c104cfd SHA-1: 6f431852c2c7420afb805eb331c283b5148f3077 SHA-256: a651f5bead81ca73e42afd6f103d16b70473fae568be159d84de3e5d99ec1cfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://recapress.com/ckfinder/userfiles/files/99345617540.pdf In PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/tigimuloxuwijub.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613449a383627---80205102598.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301aea08d6e---12554566901.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/lorokijadafovatoxijetol.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/3831697490.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/kerevezo.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/xarutelo.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/mubimuvagosikupi.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/30725894303.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210906_163850.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109080801518622.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcd818cc59---fetevaparolubasi.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/bakomoz.pdfIn PDF document text
    • http://khiensa.com/UserFiles/File/nizuxetavofufe.pdfIn PDF document text
    • https://akemi.ro/hirek/file/fipatefuserowud.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/lijigewu.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/3751622614.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/39204555372.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/63016357131.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/96244507754.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/2202946557.pdfIn PDF document text
    • http://yanartextil.com/firma/files/sibenereviroxe.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/9846964840.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/25402633655.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/58381610549.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6c9a02ff6.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+pokemon+xy+androidPDF 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_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 10680 bytes
SHA-256: 5bfc2801dab971d59ce2c940d3fa57207856cdcbd2ee766c2d22462e133fcfcf
font_01_sfnt_off0001197a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197A 18768 bytes
SHA-256: c9d71e97caff3513176349f043f9d463db1a2e7572a93fda2bf62e5bb14070aa
font_02_sfnt_off00014a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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