Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae91baeabdf9b04a…

MALICIOUS

PDF

74.9 KB Created: 2021-09-12 08:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 335a28cf26d63ac3ba3c11d5606e3282 SHA-1: 1b1cb9d2fec584ba1983fc9e9d7686095ed40066 SHA-256: ae91baeabdf9b04a4a8dd72ef9388e0478a3d333fbfe9ef194b639925788dcff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to domains identified as compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/38cbcdbc907b7c23cb647bbd6195f7ec/63831183110.pdf In PDF document text
    • http://rspon.pl/images/wyswig_images/file/1561995873.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/47a1f5626309e567f3df7f5b6ec25fa9/rivalulozulu.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/93791499365.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/vawotabifajuwob.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/86559308528.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/91200551552.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/1185391243.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/85122613077.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/96043794056.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/6d7dc43afa43d16be483fcb9c27adae8/10059183357.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/75048902985.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340333e0fc1---60389662244.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/89822518986.pdfIn PDF document text
    • http://traviet36.com/upload/files/tepumu.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/binolofezelofubo.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/ximosanevegixo.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/govibijiporo.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613139a537d03---64525709035.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/dugowomusafurubizenum.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/91222181435.pdfIn PDF document text
    • https://jackinthegym.com/uploads/files/202109101324308750.pdfIn PDF document text
    • https://cooperspick.com/files/jelaxi.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613857fc9d735---kuzineve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=brighter+grammar+pdfPDF 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_off0000c268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC268 17168 bytes
SHA-256: fc30eeddd60a8f4287cabf1a61762295f2ec3b62ce0bd5b5ec3cd66e0fcd95c0
font_01_sfnt_off0000eeaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAF 10560 bytes
SHA-256: 363a0fc3bb7d5d556725a2ff2e66a83ba6d6141ff0e1641aa20b1aaf2dc8fbb1
font_02_sfnt_off00010690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10690 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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