Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d7130afcfe9d5d…

MALICIOUS

PDF

83.1 KB Created: 2021-09-07 07:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 72453e9da2be930dea55bd76bc470ec7 SHA-1: 6a01e8b2a14b1faae5c834cff9f4b287a484de93 SHA-256: f6d7130afcfe9d5d5aedf777911ea0c6b7a48cc8b8c8862531822a471677673a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://kaptenhoki.info/contents//files/banetalalogonixopolede.pdf In PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/k9icvrvrnihmdj1hqcarb6c9tg/posonaxulamewap.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/16827515933.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/gujujugawulo.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b655ebe9b1e---rinodolirizinodiso.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/87604929473.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/a2gdclv6fa40atkdsptvvv9l12/zedusejodepujulew.pdfIn PDF document text
    • https://laser123.com/geektic/files/dajuzejifivomatuzadosobo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/4910d831c0b367488be904862e3595a3/lugemojemiwefitufoje.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4794e01513---sobulovinetukebipe.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60CBE4E7781A9.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e882cd46f---nonirese.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b55b8a17046---roxinaler.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/sufibig.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/eftu14acoqotvp7badtquv5r10/17051454187.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/wuvafavotudi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7196984fae1d5ef18c8b840467de7c40/17382033311.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/sutepirunudasunapomelokek.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/zulalixavijavuvogibox.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f590704f266---21320728218.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/gixuxijaduvomibonitim.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/81ca33cb58a7f2bf029b8d62d70cc57c/21259846975.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/dowapupilanowafodem.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/454da60164d14b9c24de44ba356521f7/zafawevara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=mobileye+630+user+manualPDF 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_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 19892 bytes
SHA-256: 52b10deb8593f505e137281717ec2c1e0c727eb32a702c6e042973baf80f40f9
font_01_sfnt_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 10980 bytes
SHA-256: b2c8d6477d3fbd02f03b792f119d9438e113cb6d86513704ca3b1270b179b405
font_02_sfnt_off0001271b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1