Malicious PDF — malware analysis report

Static analysis result for SHA-256 db65223e3df6cb60…

MALICIOUS

PDF

69.9 KB Created: 2021-09-02 12:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c33063c16e258843105b737193fd635 SHA-1: a98c2b4d8e855c906fbb32a4c10ab40f85fdd4ff SHA-256: db65223e3df6cb60d80025107fd6b30c034de509ea3072fe13eccf51bbb86d15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure and URL patterns are consistent with known techniques for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=dsr122+battery+charger+manual PDF link annotation
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e78f4bcecc8---27722556452.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cf791612642---fexebokenadapasogosifiv.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/49242748910.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/padim.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160da464f345f1---tebefe.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608200d3d84a3---vugalerasekakuluri.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a35cad43b98---55210911318.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/sizaxulovutovu.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/newefukaxezupasor.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/0c0d49d33668dfadb27c79f69ae93ee7/77444114171.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/3473131628.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/pumirol.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/2ea254aa2e4a87da02fd666244aa120b/xesefesunijelikazedovib.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/16500036806.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa905e3a89---dabelitoweve.pdfIn PDF document text
    • http://amandamaitland.com/images/file/7564882977.pdfIn PDF document text
    • http://iworking.vn/uploads/files/wuxorixusobixubebefi.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161294ee078957---37048104605.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/retimikepawugofebovixok.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160735602ebcbf---4993657813.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_off0000b279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB279 10992 bytes
SHA-256: 78574c91033cb6c8c2f48fef4b430c4e57d95a662fb4a1997d1ceeb350373b4b
font_01_sfnt_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 15260 bytes
SHA-256: 20d0261b1579ce21480daf8463e31f29f1dc9ab83b9ae264067a71f47f02568e
font_02_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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