Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc6652ed0a8d97b…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 20:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: acac81c497b188e35b540b5618e17da4 SHA-1: 64238361a4d15c6eacc570e528b0d5a1116c0a6c SHA-256: bbc6652ed0a8d97b364cc29a963c04f8d8643f95cc6e472a8e4803886dc81742
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was identified as malicious by a machine learning classifier and ClamAV, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://egokituz.eus/files/galeria/files/84058981737.pdf In PDF document text
    • http://driver-jazda.pl/upload/file/40083432114.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9813039d7---wukexo.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/migodeneniroxojejo.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/poluf.pdfIn PDF document text
    • https://sy-tech.eu/file/63825428390.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/98738550017.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/zejivuve.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4f34776ff---15514617039.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/ba4hakt19vo427qdkecogq6o55/32809954222.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/wefopozobavokafokogox.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23a8262c52---76900452170.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/c3ef4e7f6193d0e580034d733182ae7d/60999182613.pdfIn PDF document text
    • http://kenhuffbuilders.com/userfiles/file/73877000520.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098b04965200---88880392469.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/27623404923.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/14188346004.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/7j32dhklt95lp9v2vj1e5d43nl/50930799672.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/13de8aa708fe6f37855f43b5753e0d48/21357005535.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/73517661519.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/56600618592.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162827425884.pdfIn PDF document text
    • http://wirheiraten.de/images/file/wenakabowazokafodum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sinclair+ferguson+holy+spirit+pdfPDF 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_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 11188 bytes
SHA-256: 71ab7171e9dd508d0ed9abbf496f6144c0029a65df51077f2b06db8972051055
font_01_sfnt_off0000f7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11006 16756 bytes
SHA-256: bf8f31c6087862e119e4c8cdb833812cf99317bb13165ff5f99e271eff5d0f2c

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