Malicious PDF — malware analysis report

Static analysis result for SHA-256 956ee626c6d9d6bd…

MALICIOUS

PDF

97.8 KB Created: 2021-09-15 14:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f470b96f415bb1d3a9f5aa47651f5f3d SHA-1: c78d96c5e08055649b45237c380a2689dd85aef3 SHA-256: 956ee626c6d9d6bd9db6e3db0a6aadbaa41bed5b126bd106d36e80d2ad311a96
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 or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16140e7687ad38---94747276689.pdf In PDF document text
    • https://hotelite.in/userfiles/file/99945817692.pdfIn PDF document text
    • https://magerp.org/upload/files/fupiza.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/vogezugaxosam.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/vikelalofiduge.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/pipagaxufif.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/67162532971.pdfIn PDF document text
    • https://artenika.pl/fck/file/26596270063.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/42873270820.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/vatovijevovuwej.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161307adbdb9a5---puxegefosowejerogebutide.pdfIn PDF document text
    • http://holzweiss.at/xijomaduzinolarusoxetopu.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/rifeviba.pdfIn PDF document text
    • http://badgerhillfarm.uk/69989098241.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8f6f9f4fa---karojerebej.pdfIn PDF document text
    • http://konberdbio.com/upload/files/lonuw.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/palomazilufugomufogin.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/nipukeronubitusaw.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/62426057961.pdfIn PDF document text
    • http://benetalent.com/upload/files/94662605147.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/putesodivafolaromebojiju.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/safafizekit.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/fiboremowubegamewo.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/13514131977.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/45904258627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=watch+my+hero+academia+streamPDF 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_off000118f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F9 10592 bytes
SHA-256: 3eb1404129086177b6cf623b690f998a8c0e87fece406b0bded7ebd84a84d0b6
font_01_sfnt_off0001313e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313E 18672 bytes
SHA-256: 5cbdaa843c43b24a54e5635f5b9239d4fcc0c0df3c61d9596cf0a17f1951a1f3
font_02_sfnt_off000161f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1