Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e599212cf581a8…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 11:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c6e0cecdcb45f4d6dbf99799d098f5e5 SHA-1: dfc0a3695c9cb55aafb5e0a3e3dcd95f90577c68 SHA-256: f7e599212cf581a8b5b06cd624880a209bc582c932ab67c967195842ff246779
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious content or downloads. The presence of a link farm on disposable hosting further supports a malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988e4f0551c---5015639561.pdf In PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/06dd706946a00f2e1b27d5baaf0157ff/zebaxuxavubexawane.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73521812103.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/40765814739.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/betefubuzofusorabeg.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85ba83d1fa---kasufegikebite.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/sugegoxitizo.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/ligujeraxisaledu.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/maxewet.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/23955475757.pdfIn PDF document text
    • https://sbufficio.it/file/42283528209.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/56fe5e15f9d068f256d142deb00064d4/35880561284.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/48221350661.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/nohb83s49nd4369oqfdmrvsjvk/baxip.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/51234110890.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3eb44d0490476b5a84cb3ee75209d73e/jafororuviwananeri.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/mebinotawujisezetebipe.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/55453029401.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/3ae6ded70f4cb8b174c26adbfe840bed/67186209418.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/44456734407.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/d63fe10158afd1f607469f5e4c7eaafc/vumaxevezuvewowuvapif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=guitar+music+theory+cheat+sheet+pdfPDF 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_off0000d43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 10988 bytes
SHA-256: 51baeafa50a3055fb2b480bd56aa043930177ce41b53f2083b263c65a96e190d
font_02_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 17604 bytes
SHA-256: 37fab842872baa05789dfe4c917471ab39046f2dea1ade4d90641fc8d850d731

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