Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0689c06620f1f1e…

MALICIOUS

PDF

78.4 KB Created: 2021-09-15 23:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ad9b107adcf1e5c56ec8c6120989d3c8 SHA-1: 5b9df163f0b64bd80e44a2ef38b0be92bfc76d80 SHA-256: f0689c06620f1f1ed89d7b3ccb877769a43bbb74d2e1535afb29168c64949529
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with multiple URLs pointing to potentially compromised websites, suggesting an attempt to lure users to download further content or visit malicious sites. The presence of external URIs and a 'download button' lure indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chp-travel.ir/data/file/gosagutaparuko.pdf In PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613964ec6c57c---mifeletifosig.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021090531729_494409827.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/99404097180.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/35480644029.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/72032364111.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/rezibirerexosuvuw.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/71194297654.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/patixi.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/jolewekudaburinunaloxalo.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/jatodapinezotuliremakojan.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/34036232094.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/501031882df85cd1471dd23f591c1862/31714868233.pdfIn PDF document text
    • http://4bx.pl/public/file/10147170254.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1612fcd7683490---javiluviloxoremuvatomi.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/dimafonetusal.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/popujon.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/vixodumideja.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/e9a069feed738e8d60c2ae38cde3a4b7/foxedululegirotak.pdfIn PDF document text
    • http://scpt.it/userfiles/files/32298083704.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/22307012669.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210913_C119A78FAF51A43B.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/49938058923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=zack+snyder+justice+league+movie+download+freePDF 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_off0000c6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C6 11368 bytes
SHA-256: c63cc3775f7d6caf73c3af62c4f27935992163b9baa8d83ddd1492f6da177fc3
font_01_sfnt_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 19288 bytes
SHA-256: 5a715ee5ec5c39485fd6ac878d1ea5d8bbf76aec6c835edc37028054b262df72