Malicious PDF — malware analysis report

Static analysis result for SHA-256 186110c1a63cc712…

MALICIOUS

PDF

85.0 KB Created: 2021-09-18 11:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 33784b6d052e867a7265e1eacf10dfde SHA-1: bd13ef33aa302118c27d239ef8a783a23d31ed75 SHA-256: 186110c1a63cc712dabddf98a1c02cdada6d68dcf3c9700f61c8b217f316e63e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV and an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external sites for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://villamishkan.com/310renonew/front/images/files/98613792115.pdf In PDF document text
    • http://verkaufs-akademie.com/userfiles/file/23416154815.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa5aae8aeb---bigazolod.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/pezanisiberuler.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/ffab5017ca4885df0dfb1429ee042c47/lozigirani.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161301af553e4a---zerimavugateluji.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-01/2db72785bb3b58154d2eae8bc024da2b.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140705e972f2---7181993535.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/70342921955.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/34457606764.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/0d1e1e0f49bfe5f72f67b6616fd11156.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/xosinaxolubofujifi.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/78448156225.pdfIn PDF document text
    • https://duel.pl/userfiles/file/bixegeresig.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/tarusabeturenuwamuzapefak.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/47834691787.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/60786176685.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/aaf07226699f3c70218945e0461a465b/14732580333.pdfIn PDF document text
    • http://isvpro.com/custom/files/72303089336.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/9126676224.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/xumutuforefogulezam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=application+tv+gratuite+pour+androidPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/navupudorej.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_off0000e639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE639 10668 bytes
SHA-256: 9503910b4f75cfce2ec9cb5bff8c404628acc5af5096781786a619a743e9a535
font_01_sfnt_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 19160 bytes
SHA-256: aadc390661664d58411394b224276e1bf8d8f054b821ad7856b0fea96f442313
font_02_sfnt_off00012e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1