Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ca0722bd6aa62f…

MALICIOUS

PDF

91.2 KB Created: 2021-07-04 10:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb66bc03c3b8842b31ba70aa40411e17 SHA-1: 7fb91559f9d9c8c86677d484bec2baf2da8143bb SHA-256: 72ca0722bd6aa62f5732a0a2eeb2b7d0fa9532d23740503d788e02d1ee38804d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document body was unreadable, but the heuristics strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c960921bbb---67867281128.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/87226b83f75b71042c4a1999b9cf7972/97581661552.pdf
    • https://amitadevnani.com/userfiles/file/46063953896.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/7de4bfd625dffc5f6977d800f4871739/vuliwe.pdf
    • https://peilimineko.com/userfiles/file/nevitubovapabisaxem.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/sosikutuvixikip.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4bbe8531f---79677835346.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0e59d8c8d---66362897414.pdf
    • http://goref.ru/files/file/zemibizobosolidanamupaz.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/2d47mc42aam4f3foa1e5imcec3/83545473497.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c48cc71ebc1---sovajuzevekulenozix.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/d5q7ebcevcrqa79nu7qsbm94qi/16115583297.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/ooe6unsgtestdq2to89d1kfas1/vebalidapatetakodo.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac3a7mft5mh51ntj76tk88rul7/mupel.pdf
    • http://ajtoablakcentrum.com/_user/file/vosaxofijedelemutiwur.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a0a72e052---44848457927.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/g3jv0p9tn5ubcdptilijudu255/25944349703.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e945a6114dfbe202359201aa51fd5503/gulekusisusotobul.pdf
    • https://protradingindia.net/userfiles/file/87340332242.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/831b2171b6f1ac332efd487d586e93b6/pomaluzepano.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/o4j15tnmmtvlllb3v0fips8g03/40637645105.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/183ce8a1556f066ba8bfac6fdf187df7/3275258790.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4077485c58---55171798063.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/549ead889c5c44dd717c2949ca7a5043/78637570191.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f9dedddb4---37128119452.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=abortion+pros+and+cons
    • 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_off0000ffb8.bin
7beb3a609bc6c591dca4a26bc4bfd59a8f0528335e2c13cb9256bd1cd109c4e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB8 17640 bytes
font_01_sfnt_off00012e06.bin
d2e2afc271feaf97769db611387fa34ab41db8db1da45d5b6a60bdb05475c665
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E06 10452 bytes
font_02_sfnt_off000145ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145AD 16792 bytes