Malicious PDF — malware analysis report

Static analysis result for SHA-256 27da05e36cc50204…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 00:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 56ac53e70e44249c36838dff9673c46c SHA-1: 6a8af308f801d9b49591a4f3abfbb9edb153c4fe SHA-256: 27da05e36cc5020459b8ffd6a5be6a3e5d43e80c0a42fc3448e66ecd08d63ee1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=voa+learning+english+download+pdf PDF link annotation
    • https://senfina.top/uploads/files/xidupogabilaralo.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1612d80f968bf0---30039064133.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/21970501397.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/4779813334.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a3c954f65---wuxifowekit.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/3itjkc93p7156gtjjcg8dbgq50/pedulozaj.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/dojoz.pdfIn PDF document text
    • https://mauspro.net/upload/files/tujakaxujupedafed.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/fufenixafekunididirarova.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce27a6d1fe---14702419981.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/kuleunc7neuc0vgkemms3ag6to/jegima.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9c5e72e4b---5822652149.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/07aa0cfa599c9c5cdad6c0f6c8f25042/litenakigaxu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd876233e3---64994950591.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a952cddef---sulofopud.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612e70310f0e6---fedikagimunudifasu.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/46316298681.pdfIn PDF document text
    • http://4bx.pl/public/file/69696979684.pdfIn PDF document text
    • http://dentistturkey.com/image/files/40127117533.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/881e062b07c8fae970f505437f88176f/79746291297.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/99560962821.pdfIn PDF document text
    • http://kahasat.cz/data/file/dexisenobitufubukibafapip.pdfIn PDF document text
    • http://lidata.eu/files/35261625385.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/notemibud.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fc141b3cf---94976479900.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_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 10732 bytes
SHA-256: e5b1261481c0c484f613d2a6d7dba5fb532415049970d265c142439227923cc0
font_01_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 18356 bytes
SHA-256: 171288d3e49cd159c3248ddf41113a76b915aa2c0382e8a8f836027f6e2779b4
font_02_sfnt_off00012439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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