Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96bcde8debda3c9…

MALICIOUS

PDF

90.5 KB Created: 2021-09-01 02:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6fdc80eb0c53cfe853762ca030c5a934 SHA-1: e979aa9fa23d5631399d26aa63dc04aa7aee40f9 SHA-256: e96bcde8debda3c9a2fdf91c0d8b6ecf4a1f5aae42081080cabcd69bf9d513bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa9e729354---87132736879.pdf In PDF document text
    • http://condosworld.com/abisol1/userfiles/files/sikefaviwesemejoxitur.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/3050331292.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a52d873f87---11185004847.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/kcf8bpgfipjp81vshhj15h43c7/mosulovixegabupakajed.pdfIn PDF document text
    • https://songhong.info/userfiles/file/77564613472.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/98981299881.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f74aa439b2b99835adeda1c272e8d003/47634882337.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/7958176072.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b30e0b0d43---1351876186.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/sulajorevexobegus.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/jalejurajolol.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/diterixagexepovip.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/42499756547.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/rodasexiropijemewanizefe.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88374576230.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/zibukojifimu.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/49224089364.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e6cfbc002cd---titubavowemamevafuwile.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210704112110_gue8w2.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/24453478512.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/f6e755be3910125b5b6148676f32383e/5457122033.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/lobexabomevoxaseragepe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=statistics+for+the+behavioral+and+social+sciences+5th+edition+free+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_off0000f73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73D 18988 bytes
SHA-256: 70a0eb6c16509e644b74aa6ec19c02aef918437b28053e811871c1759f679bde
font_01_sfnt_off00012892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12892 11132 bytes
SHA-256: 88b5d7bf221cf5b496d85240085b12fdf530fe4d9e1b75846ec298c9d444e74b
font_02_sfnt_off0001424b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1