Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceeccbe6300e3fb3…

MALICIOUS

PDF

80.8 KB Created: 2021-09-02 22:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26a96feba29011a4065e3b85343335c6 SHA-1: 3201d751da68e1732d7c4e02b550f4a1714f8aa8 SHA-256: ceeccbe6300e3fb33e2c61b6ce0701e63c9a88cfabb386feca6a97ac0c72411c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/a9ac9f66b3156fee72501120b609c1d6/8745661162.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/0bf682918b80da37a41f9a8d5413c35f/tejitibajipafesiz.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/r710actahmr5504dbqc7akesai/buvazuxojerujevexu.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ce2e03d91---43534960338.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160967a9bb6219---sedonomirijuz.pdf
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/12072237911.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/2ce6551630ea5da2f593701a880b86ce/3691631333.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/91234106997.pdf
    • http://netdepphunu.vn/images/userfiles/file/ledapugotaluxubavoze.pdf
    • http://cementfeet.com/userfiles/file/xaduzi.pdf
    • http://mojahotels.com/ckfinder/userfiles/files/59897366433.pdf
    • http://kartelabasligi.com/images_upload/files/faruwafudafigogag.pdf
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/mozazuronidosozopuzogi.pdf
    • http://hunting.kg/userfiles/file/raniwibozojodeli.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608406a572bb7---75814775288.pdf
    • http://harchovyk.com/userfiles/file/putasikujulev.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e7d5b48df---nolusutux.pdf
    • http://mixmarketing.vn/upload/fck/file/29871576785.pdf
    • http://bioident.pl/photos_fck/file/61099820544.pdf
    • http://www.leasebridge.com/CKUPimg/files/naxotumepodekaxaf.pdf
    • https://riolospettacoli.it/filesUploads/file/towozejo.pdf
    • https://www.esfa.bg/root/ckfinder/userfiles/files/51247885900.pdf
    • http://girisimcilikproje.com/resimler/files/rogumowalosugarufebulawi.pdf
    • http://erictex.com/ufiles/files/55412273768.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=kobalt+electric+pole+saw+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5dd.bin
d6b512c00f41a7137023246c1b30889ba130bd99a54a010efc513bf226efa3cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DD 17912 bytes
font_01_sfnt_off00010490.bin
2948c166e63be9c18c0beaca2397958d200410cd99bb26f83e40b7380b86b4de
pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 10852 bytes
font_02_sfnt_off00011d7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7C 16792 bytes