Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c971aeb7b0ec494…

MALICIOUS

PDF

85.4 KB Created: 2021-07-03 18:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e72f64f0ab626dfffad8c3d2ef27a219 SHA-1: f08b3471240b71bb823c067e76a7ae721175856b SHA-256: 6c971aeb7b0ec494c6cd4b4364c9b2bb1ccfe3c6535c783277a136e43e2e624d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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 http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd61e58fc2---89570536516.pdf
    • http://szkolka-wiercioch.pl/files/file/levevinulupefabotozex.pdf
    • https://aashianarealty.com/file/kifilutimeguzodakoxi.pdf
    • https://bnbtravels.com/ckfinder/userfiles/files/sonuderovubaxan.pdf
    • http://adamlegal.com/userfiles/file/85887792203.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/3c50ba175646c8b69c6178629bcddc80/ximirujoxibadi.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/9133309179.pdf
    • http://azseal.net/uploads/userfiles/file/50142269406.pdf
    • https://floridainvestment.cz/files/file/vedagosube.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/o69f8fkgj6s263bih17o8pgnj8/82871889219.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ae438998b---90740748876.pdf
    • http://mitcostruttori.it/userfiles/files/zuwife.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/b7f9044b2ca5bb0ef7c6cd3fc4d03eea/99893861997.pdf
    • https://bouveau-consulting.com/userfiles/file/loxipififutoz.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/jhg55oq06n90lpdfcupe6p07a5/88626737215.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b84a7ab3f04---pikawago.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160788b5bab4e6---fesozu.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160c4de6147ccb---93473441055.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b29d1961d31---wiruxovarejumesosu.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/1f74d716c3594d0c709ca31444786555/83378068099.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d5fbeabae---31789166611.pdf
    • http://bundoreh.com/fckeditor/files/file/wesezepibenovus.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f4193feee08f404cb68df5d48d2bc670/78688108384.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff2253d250---13232153515.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=wow+netherwing+rep
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 16792 bytes
font_01_sfnt_off000104d8.bin
c5f1b0f7dee9054fca984a3bf1a211110462ba877a8859a24d57eae62b833d1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 10232 bytes
font_02_sfnt_off00011bc9.bin
e05c4a7fa00eb0dab7f3b8ade4b85aae2b3dcc2cc3858ee059ca48b4f8255b86
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC9 17220 bytes