Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d1e6adeab97f19…

MALICIOUS

PDF

105.1 KB Created: 2021-09-01 13:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1283334f97dc59d9b9807e49ad208171 SHA-1: 29a3c968714f557c2b12659d3c08b8d3c54ddbe8 SHA-256: d2d1e6adeab97f19398ddfd6ab5c63d76ed35f683b3a160f787234c43cff4cfd
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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://meteosputnik.ru/userfiles/file/waxufagubajijed.pdf In PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/namozujusedeboseba.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/19082298753.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/e000c0288c73532e1c41e12f94aa1972/54257722542.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/dogafiguri.pdfIn PDF document text
    • https://edcasys.com/ci/userfiles/files/51731514413.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/19394712793.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/c9f05238cfba61495e1450626aeab2a4/peximeruxiwimitik.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/jafasi.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/ranawagotoxuzafigijo.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/jesujafurakuboxizosasejop.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d92329a7242---nafonemunofidobatas.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/44e0b4662d6e05bff6c5d655ef9670ba/71295202763.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/13490722861.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac592bf102a---lebozuravoxasawibuxegun.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/647c69e6de5f6c659473885e83a1fc3e/valufuvuxiso.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/066a5d556bf1637a03c4c514997fcf16/vetomepatojomameregini.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094100125abe---14050623813.pdfIn PDF document text
    • http://tieuhocsondong.hoaiduc.edu.vn/ckfinder/userfiles/files/70209675352.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/vigasetagoduronin.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094d683be758---23864180543.pdfIn PDF document text
    • https://castel.ro/userfiles/file/pidikoxixaxosiduj.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29114aee99---zorugonemixevibawiwopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=use+idealistic+in+a+sentencePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11353 22852 bytes
SHA-256: 5f3467a200da82023fc8d76b28da40c767714a519a323e79589af9eb29c59c4d
font_01_sfnt_off00014ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000166cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166CF 16200 bytes
SHA-256: 2dae50f56f1681d04cd032bee0b134bdad6af94f6fb98d130ac56e2441ddb4f1
font_03_sfnt_off00017ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CA4 10152 bytes
SHA-256: ebe4edce9d84d5a77e6acc8accc238c886bc9a692715e8bc40f58c86b8f771d5

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