Malicious PDF — malware analysis report

Static analysis result for SHA-256 feffebfc1d4654fb…

MALICIOUS

PDF

86.3 KB Created: 2021-08-08 00:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cbbd918d722cbf05137359b52a86af38 SHA-1: 4e65f073f5291fbe45b20498b5bd215b16e5b717 SHA-256: feffebfc1d4654fb52bb799ddb9a9ff226606103ed12098ad81a2202ede73427
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous unknown URLs, some hosted on compromised CMS uploads, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://activepymes.com/pub/file/godewutufuporebekejuw.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9e062bfe---jumodulelibeb.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/33604252250.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/gepepinebo.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/50729903657.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9e5bc1ce2---zipili.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/50915287575.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/627680851.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/fujojefonokifomulupotuxum.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/temurexifed.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982dcab1461---jegusemikiwemero.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a961497f588---duxunababo.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083f9ba13dad---66233032554.pdfIn PDF document text
    • http://apsons.eu/files/file/77820537627.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/laxinizezerepub.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ncqdjkojf843heg4sjmqu8des0/32366411666.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/pen60r816dhesj4m222e3s7373/wefeponexuxanarufedire.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/donimekananugamopu.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/36693892162.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/81538363021.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9a391896f21083427649c83e77fa8efc/bufigoxidisuwuvu.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/33526075022.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4f261b84e---bipajegora.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/40121802959.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/nofuzidemugunimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+do+i+arrange+an+uber+ride+for+someone+elsePDF 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_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 10916 bytes
SHA-256: a1664c2dc4d23688f850e2d2c63d5b0eaba8d9521e91b25db9f50a43c65be915
font_01_sfnt_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 16840 bytes
SHA-256: 6eaf28ad4a7bb165836474da5d6fbe6a72007d5908c44f4750142e5835262bee
font_02_sfnt_off0001330e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1