Malicious PDF — malware analysis report

Static analysis result for SHA-256 e249eee02fa28214…

MALICIOUS

PDF

77.9 KB Created: 2021-09-06 00:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4727de6b09594b10e4e8f5a2de4ba053 SHA-1: a1f60ce1e946aaa7ee12d4c038ec1cb4a1c50517 SHA-256: e249eee02fa28214ca19eb071521721ce6cd794e5cac9fd0f7269ffc4f90e32b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, 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, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 http://izeninfo.net/admin/upload/files/72240993037.pdf In PDF document text
    • https://samowar.me/userfiles/files/tikoja.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/75052378332.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8619f61045---fozudibej.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/40535256423.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/vskjp8h2eb15h043a8ltsjn56g/fazulojakiganito.pdfIn PDF document text
    • http://www.asslar.de/downloads/pokekoliselotefezo.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/taveruluzedugezudupos.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/79459200619.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/widudigexovafoperi.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/72080296151.pdfIn PDF document text
    • https://termofriz.rs//files/likosigajavujobilekibod.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ecab0ed593f---36361453576.pdfIn PDF document text
    • http://edison76.com/clients/5/54/54c13950cbd15a81e6fb4362eab8f273/File/456989266.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e1ceda561---fefejafofitokilamofopapis.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5b767fd0a---512029844.pdfIn PDF document text
    • https://polandpools.com/contents//files/79228724154.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/potakivudatosobanezibip.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/27473716642.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/64593316187.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d4de0533b---83579957253.pdfIn PDF document text
    • http://xmst.com.vn/app/webroot/uploads/files/83262780994.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/699d5gbfde4bpgsr287l16plvl/74557432563.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pemodu.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/7fcl32p04776egfsvi484kkr75/remawixopupaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=mla+citation+pdf+examplePDF 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_off0000cb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9F 17844 bytes
SHA-256: 98b9aafec105e5bb29abdf44f6463cd88c16db84742a179cae280d79e9c1216c
font_01_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 10608 bytes
SHA-256: 5ab8032692cee0d0341bacb6cb9d972ba78a13ab4aa62e24bc88e906d8740639
font_02_sfnt_off00011230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11230 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1