Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e2a49795a2c0dd…

MALICIOUS

PDF

76.5 KB Created: 2021-06-29 02:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa3483cf11927053d9f9b08654ac7c72 SHA-1: 54d5e95b54876fb250328186ca7b660c267cb940 SHA-256: c5e2a49795a2c0dd9b59b25bb214c49eefe13f11f37f54ae77a146d2f3391f6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites. The primary purpose seems to be redirecting users to external content, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://resetimpianti.it/reset/public/file/16566681753.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5c4dc9dd7---mejuwakovojezupitorevoxat.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086920ea8b8a---52589261685.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/nijalurixamitugo.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cc959540980---wozusutorosuzem.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075107d13ebe---dazujubisajalijed.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976237f145a---40696664398.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a752078e77---23780685315.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b337cb2033---pabaginobelobosawop.pdf
    • https://feldmann-spedition.de/pics/userfiles/file/xumolorufatibax.pdf
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/16832511930.pdf
    • http://didula.com/img/file/72994222331.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/30b1cdfd1385505010fdc804ce69bdc5/muxadadarofiwagiligutoki.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c93b10404d---xozibilogerawug.pdf
    • http://crackershrimp.com/file_media/file_image/file/najamefevapezav.pdf
    • https://mvservice.it/file/31080789714.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaf1a47ff4---98410174779.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/fd44v85ul1jgud6ckfkq7rtg27/9120312381.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/7b5a8e58547b1e0e44488e3fe9c968bd/13966050816.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/7id0tkj0ibt5trbggga2alvm3d/kepewalitawezifevatafiwa.pdf
    • http://iamsong.vn/uploads/files/41886615190.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16075c2c88dda7---11668475643.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=switchgear+protection+and+power+systems+pdf
    • 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_off0000c942.bin
ba0784fb33350ac7f4bb49e6fc0416e22f87b89c0108125fb387afa0cb4dc326
pdf-font-stream PDF embedded font (sfnt) at offset 0xC942 11296 bytes
font_01_sfnt_off0000e37c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE37C 16792 bytes
font_02_sfnt_off0000fb8e.bin
2cefac90838cee490e5b8258227f0ba07d28b9f7d1ed5d2512ea8ceabda03891
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8E 15952 bytes