Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5916991d685a2a2…

MALICIOUS

PDF

79.0 KB Created: 2021-09-24 01:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: feb38cbc676979a50d3821e9ecab6502 SHA-1: ea952887a8b88c38c2ed3ba4a882f865a524109a SHA-256: e5916991d685a2a2455f48bf3397a41519dcf689e4d1e6cf98820bc2d7796895
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8363

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://cructi.ru/uplcv?utm_term=apps+param+de+funcionar+android PDF link annotation
    • http://avsa.org/sites/default/files/images/files/paxojikerupovobezuvufavup.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/89202690303.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614d016f1d957---ronimezatelo.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/77681465038.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1e44ec1eb---16729945337.pdfIn PDF document text
    • http://poultech.net/d/files/wiwebimetekaxivejuzalu.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140bbda2b37e---61000014180.pdfIn PDF document text
    • https://crawfordpoint-ca.seeninherd.com/files/bifilugabovegof.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/gimewidamu.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1614a32c7d56b5---65977387861.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/jesezozasilusuxezox.pdfIn PDF document text
    • https://szallas-karpatalja.hu/upload/keduvotiledixafit.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/surudamekaxi.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/dewujaralexopaxexezobebil.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5617c37bb---loletuviwepavomijoteker.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/jizumokoba.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///68308885935.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/voselewatuvake.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/zelatolomuper.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ead836b4d---mosik.pdfIn PDF document text
    • https://istanajp.net/contents/files/85196060080.pdfIn 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_off0000d945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD945 10720 bytes
SHA-256: 122b7430c846cd0afabfb8060fd119d6a388f49e1fbb362a490e7be506e2f561
font_01_sfnt_off0000f1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 18812 bytes
SHA-256: 421c4f0f3ed0e9c7766e6edaee4e6f69782db968f9a02e9658b24c8553bd3fcc
font_02_sfnt_off00012294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12294 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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