Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b8a385c85e7c96…

MALICIOUS

PDF

124.7 KB Created: 2021-07-19 08:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f14d1f68e38b76c48357a488f86a08a6 SHA-1: 467e53dd1151182aad3f07c9c48196afb6d24376 SHA-256: f9b8a385c85e7c96dd534e00bb8a1072e802977be43f2f273e5717594a30571d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS upload directories. The primary attack pattern observed is directing users to potentially malicious external sites through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://pwmtqatar.net/userfiles/file/dajujefojugixew.pdf In PDF document text
    • http://nuraski.pl/wsg/userfiles/zusomuxa.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a38f1d090c---69814965824.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607417fc2cf5f---60238672339.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/9abadb038dbb791a3baf7620104dad46/56849426718.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf36645df97---pinulemozux.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082a1a5091f1---11161169882.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/mojofirewiz.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2e3745644---xesorukaxesojenefugiwago.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c330abc0cd7---73992828116.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/89617953737.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/62566377042.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/fabc1375fe001f556d045bc5cae5b5c3/4416193445.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d29ea6b3515---73023520694.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/fc32aa1aa2b0f272e57ede2a49038bb7/wodozozazinamuxawenoful.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/56124268216.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/magevovedov.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b76975056---buwowesapenatapasit.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/45292592599.pdfIn PDF document text
    • http://djapm.com/userfiles/file/73077763423.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///19279063456.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/52886919419.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/cfcdcc661e3913924828dc7fd6e921e7/45751480271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=correct+grammar+and+punctuationPDF 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_off00018698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18698 10776 bytes
SHA-256: 060a784b3987e656cfc691c7c08046d7c15deb8d9736b4465494629ed6f62249
font_01_sfnt_off00019f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B744 17568 bytes
SHA-256: ae61916ef736b557a50f1327aa0ce3b5cceadd712c30d0c16df0616f9e715a27

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