Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2ece36933b963f…

MALICIOUS

PDF

89.4 KB Created: 2021-06-30 07:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c8dfad9b2778037f5aff321eda139f5e SHA-1: 5fd7bc0e087a546cc96469980a138176e29da642 SHA-256: ff2ece36933b963f299ccfd21fcc83c40a3b903aa44828d79a7c6f531de78e7a
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://iva-vietnam.com/userfiles/file/wedobetojovib.pdf In PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/gidajigozexupejudab.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad247f2ca4f---tazuzawibevivapilamuda.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a101ee55e7a---boxilezuxosefuzedeme.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050117183164.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9d3dddcec---97407060316.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/sixowibebelapujuwixisisa.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/71171928596.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9cdcfff8706cf7ce261cd2af9e6bed0f/9671681482.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/76840865093.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/k8dffc6fs3jf6t3lnp7v2t3i43/498260268.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78cb5aa60---famakupapibuwob.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/uk1k36oi5qendl71frf8p0qjj8/13932667376.pdfIn PDF document text
    • https://ebooksweb.net/files/file/dizofuwetukajipukufitazi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091a4a552b40---2766044585.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609daf5897b86---tunevefejuzimobik.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/13942934252.pdfIn PDF document text
    • http://bakoca.hu/files/file/65729642163.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/84949056058.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/11a2412c575e0838d329f404ac14a6fe/bajitogowelam.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757579b678f---wumovofolaludadowubajuwux.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b48e816491a255440e56d096f809e176/karazuxokaji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=reading+passage+for+grade+7PDF 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_off0000fa96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA96 10624 bytes
SHA-256: a3f83b559434fcf74ecd4722b3f61bb4bda6475d55bfe939535f019993414106
font_01_sfnt_off000112c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADA 17352 bytes
SHA-256: a65c75054e58a416fd8725cdf542e9f523e52b049a131c2d39531febcba48f41

Open this report in the interactive analyzer, or submit your own file for analysis.