Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c6fc6303ce8601…

MALICIOUS

PDF

234.2 KB Created: 2021-07-23 07:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 31f8a7060aa8fdd83a632fa890e4ed6f SHA-1: 2606d6642c9d17abe5375e8e4308e3c5aafe2e30 SHA-256: 06c6fc6303ce8601c417cb716aefb2bf952e10681c8906a6f5d9ca900019badb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the presence of multiple compromised domains used for hosting PDF files points to a coordinated distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8792

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b037e598094---devepaveguxavotuxaguzi.pdf In PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607276edf27f7---kebulavav.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3oqet01ahvlcmfe353e3faepcu/58486399615.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/fupasijilaxozemojudu.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160708d0164c9e---27028384912.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aead9e0198---91016884982.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/67766950115.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76a1131f7a---wenaxubujifag.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/kugutuvazizewesitisubif.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/dapivefej.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/3a3c4aff552b137a82ab8744504b06ae/godepafekil.pdfIn PDF document text
    • http://abnicum.com/files/file/32018124816.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ee01dec5843---gokulax.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/jagetumikekimevo.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2e7c731dc---83747815247.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/gavaz.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-29/20210429044859553942.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fff4b1104a---retinejoveju.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/3429658393.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/junigevidawo.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/599960570.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833856adf2f---2629276437.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/74132764983.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/3613e10276898bab00af8cb5c135c095/92337959910.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/223892f413893e83e41519cee8d716bf/sepivazazovivurozimus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=elementary+number+theory+7th+edition+pdfPDF 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_off00033355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33355 19048 bytes
SHA-256: 7bb9ad862571c10a920fb5d9a5618b2f3999e61c1b59d507eb562a760c4a8322
font_01_sfnt_off0003660f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3660F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00037e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37E26 10984 bytes
SHA-256: 7a7993c6087e2303aa3be6947ae9ee99f0832e5644c33152e178a273c03cbfd3

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