Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d6199ddedf8077…

MALICIOUS

PDF

156.2 KB Created: 2021-09-01 17:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8875566f7e4251b9bddc61523d3268c1 SHA-1: d45ad7dbcac3a72e88c61e7be0ebc621b790d453 SHA-256: 25d6199ddedf80778bb62bbd04058f80be985787f5000d9489fe6af6eb1c67fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=sign+in+365', are likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6545

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=sign+in+365 PDF link annotation
    • http://veraschwemmle.de/fckdata/file/mikerem.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/pinap.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608affd1833ec---24599707100.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/kosumikobiloluvevamo.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/93741060281.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/fanapefobegovide.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/11319879482.pdfIn PDF document text
    • http://promador.pl/userfiles/file/kokixaluzuja.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/ladakejukalerasi.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/10649102588.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/gevatunapid.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9372a5cb8---88538433741.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/41072923862.pdfIn PDF document text
    • https://patc.fr/imagesfile/74781346720.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/80398287781.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/72841500544.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/89895695385.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/45525705224.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/56095341054.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1050d0752---xuzimimefetejugoxexuwisod.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/6168d03be55e266c94b92a3fa6798129/diwupetijogego.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160865d076daf5---xujunisurofulil.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e7ca7078b---3093990020.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/fj0sscod044ofhad6n9ti6j5cs/76840782841.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///84505391025.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/nabuf.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000244c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244C5 10004 bytes
SHA-256: e42cfa813aa3762ca1d2e703a2121c92d800c7f1467276553d5796720524f285
font_01_sfnt_off00025b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25B0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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