Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ffb82c0ac5f8ed…

MALICIOUS

PDF

80.5 KB Created: 2021-09-10 06:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6e0d4fe8b51f6e39da5fda7e00a5e47a SHA-1: 8923bfed0f3e4dbdf2cf0273da685dbecc23813b SHA-256: 63ffb82c0ac5f8ed0e7a799568289fe7a875670f8afd7d03910f72a4691bca78
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://wastran.ru/uplcv?utm_term=how+to+view+deleted+messages+on+android PDF link annotation
    • https://ribaczpeter.hu/files/file/22512977008.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630586124.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/lasopumomizajisevoneneg.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/36383606349.pdfIn PDF document text
    • http://balaton.varosom.hu/userfiles/files/15756048890.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/wisirabigegifufeni.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/58963400603.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/gazuge.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/gelufewovuvulosafedilir.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/45145613976.pdfIn PDF document text
    • http://fohow77.ru/upload/file/bodufaz.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/kamagedax.pdfIn PDF document text
    • http://alocainghien.com/uploads/userfiles/file/77732223729.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/vogunogurazuw.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/28078562333.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/23403685493.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/67914929871.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613302f075aa6---44467059483.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/1437087795.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/domebudiwaxoxima.pdfIn PDF document text
    • https://cartolmania.it/file/fojak.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/90810861384.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210904044810742212hj76hg.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_off0000d68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 17840 bytes
SHA-256: ae361207dd2c89ab5dbb380b6f28e0adfbbc7e040639b52839977ee99860e913
font_02_sfnt_off00011c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5C 10732 bytes
SHA-256: ca79edbeb95f6b2664bb825302f769aadc07f691f1d0479322e8f9dab0928dbf

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