Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb600e1ba6382e96…

MALICIOUS

PDF

73.0 KB Created: 2021-06-28 06:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b8bd9709cdc7a25e4fa21c9743e07e88 SHA-1: c984825d520ab11756618c376ed98f8ccc4d45af SHA-256: cb600e1ba6382e969b377c807c311efeefdc30e6075845fbf5645e668e8de96a
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 CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

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://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8021c03a19---seboronidedopewo.pdf In PDF document text
    • https://iqmuseum.mn/uploads/files/lemezosora.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/drjgnk5bhrgcsbub2ednme0b4m/forado.pdfIn PDF document text
    • https://iword.de/userfiles/file/viroze.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081388395700---bagobozisa.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/169fa3c9a05a0087ea95332ab0423bd8/11294148837.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be01d69f8e9---3026521984.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/sezozavava.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b55b4f92cc0---7212795446.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979f58377c6---16611511504.pdfIn PDF document text
    • https://irantruck.ir/data/file/medokakoguniji.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/99368487865.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/91198514864.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/87b43edb84bbb298ea4425a2f9db9327/vulaliv.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a397e4382---fanikakuwafobis.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/tap1s8mvb6enqpog1rm5bq00m8/pepepewerekituk.pdfIn PDF document text
    • https://bojovicsirogojno.com//files/17739471259.pdfIn PDF document text
    • https://peterdegendt.be/file/61515759221.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/71308c05a2e63c2a93f2554d3f81db01/2569760717.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1495af0f4f---dunefevulimipuxeroxudepi.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/mubexovud.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/5d0bd5780106fa5bcdfbee4b4d3ff623/23294118674.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/d6afc7fl37n1jg0s42c4l7i795/1359905677.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/70961345820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=tom+and+jerry%27s+giant+adventurePDF 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_off0000badd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADD 10952 bytes
SHA-256: 0dbe369cc789a83d480910c5549fa50a93ac6df416794dd4683b134ce868f185
font_01_sfnt_off0000d419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD419 16944 bytes
SHA-256: 6d37fe17f9f6cc8e47ab9fc4c90dbf92a4e597fd57ddcdbf7b101baae669f732
font_02_sfnt_off0000febc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1