Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c34b064e0ae126f…

MALICIOUS

PDF

87.1 KB Created: 2021-09-12 17:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0fea4b5ea94b98c631b14f3028423c1d SHA-1: 5e5782ee70d2255f8445e25501d5820d870b62d4 SHA-256: 6c34b064e0ae126f033c10629d848cdf48b709e1a2d31fbadfd5f1808f6bcd18
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, suggesting an attempt to obscure the true destination or spread malicious content. While no scripts were explicitly extracted, the nature of the URLs and the ML classification strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://patoman.ro/ckfinder/userfiles/files/danaweruvojazuzep.pdf In PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/in38pdkgnqvk96vtps5a6cieaf/97503214634.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/rs0k8u6rg93d3gm42u1br1kb0q/sixokawamanolar.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/rowufonasinegokivuboti.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/dawanesenos.pdfIn PDF document text
    • http://www.beverburcht.nl/upload/files/zewifebijularojilorogixiz.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/39242471632.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/tozizinabikizagumisiku.pdfIn PDF document text
    • https://epiphanych.com/images/file/51772991617.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/mipumojonewas.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/naporepiximezolewat.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/roxizuduvekelikugoloje.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/fedupibojetik.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/buwarewogonarikuwixiri.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/22345630172.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139cbcc1e21a---xirutozebijabosa.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/72849159641.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/gexokokutugo.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/71980825543.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/xigubowekasutupotazip.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/42842967448.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/tumotezomejedero.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/77656281456.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/29243785156.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/40065182889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pok%C3%A9mon+go+gps+signal+not+found+11+2020PDF 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_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 11248 bytes
SHA-256: 9ec5d31942064ea6b21ec50be0fd64c4f6b2fad3d58d1187611fd8f4cec76b54
font_02_sfnt_off00011d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2A 18148 bytes
SHA-256: f6bbdfdaa405cc8aa1f5efbf5b680978b3de816b0cf9de70713a28cd3857d9cc