Malicious PDF — malware analysis report

Static analysis result for SHA-256 4707ff5e13c6584f…

MALICIOUS

PDF

88.7 KB Created: 2021-09-10 20:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d8d716220525890a544f1b0128f334a9 SHA-1: a858c6fb397370a9cbe0a31f400591552e87c96c SHA-256: 4707ff5e13c6584f85d5239771171345f1ed1331a2b098f6c7fc6347ce42a2fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to external websites, indicating it functions as a link farm. Heuristics suggest these links are used for SEO manipulation or to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://philabc.ru/uplcv?utm_term=blind+dude+horror+movie PDF link annotation
    • http://iviltra.lt/images/files/94815012422.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/foxikedal.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210910091420.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/66052348829.pdfIn PDF document text
    • https://hongming-eco.com/userfiles/file/vegowekojowu.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/25443202346.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/lawanugipexomipasok.pdfIn PDF document text
    • https://petek.biz/resimler/files/86678843250.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/dokovu.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/23756218459.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eaa1f76c0a---18981720594.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/suvojedinesijidug.pdfIn PDF document text
    • https://ivantomanov.com/userfiles/file/30007462458.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136a108f3439---nelumager.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/88059640091.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/35314779459.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/wuwomarugujinubegafa.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/59395988323.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/71868157478.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/81909084985.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ec4676230---mugadizitonafimawojoriri.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/nuzovonodur.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/27131973920.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/kazepolujodofosarixe.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/varoli.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/jenogiret.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_off0000f4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 19140 bytes
SHA-256: ceb9dc30ceb0de53b4eba9a628f1bbba294dd57d3b39b1bf8b6fa4b150587381
font_02_sfnt_off00013e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E62 10304 bytes
SHA-256: ba6097c3fcccc0b413cb9cd9f3756d8ad526bf4a4a24da8c7c82607d8a4ef6c8

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