Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e2697cc5d919df…

MALICIOUS

PDF

100.9 KB Created: 2021-06-26 08:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5edbb751e225c9d2ad48dff9cf1e19b4 SHA-1: 54bee451efbf10261140858942a72aa987cce903 SHA-256: 08e2697cc5d919dfa2f41dba3e6dd22a48633d3d8323326a8b9f6a5930ccd7c0
176 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URIs pointing to compromised websites and IP addresses, suggesting it's used to distribute further malware or facilitate phishing attacks. The document body is unreadable, but the heuristics strongly indicate a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce55c176de---ribepoji.pdf In PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4c06b232cc20bee7cf7737bb9d92b123/kogunazilegevidogij.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/5k2q1u41ckvkpi8ra2rqjsfjps/tanim.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/90166850787.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160700a3be9fdb---xorobisekukela.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16091f802778b7---widizadafapaxebuwefezab.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46b574a005---muxesewotum.pdfPDF link annotation
    • http://ozona.pt/wysiwygfiles/file/56725844268.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075463b9b71e---59496906669.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40325110168.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/5mifgk5nl0v7kqa3iaddra4ti3/pugonexasotunekopuwet.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b788ba394---dawisonazobuvupusotifu.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/38565223227.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/puxuvabepimipizavunodeba.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/gegomadedamasuwujofin.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/nupabiwumizuwewuno.pdfIn PDF document text
    • http://recrute.fr/files/files/vuzomadalelaruxesa.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/dalevodadanuwa.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/83243675748.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6878a1480f---sekomifovew.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/xisunufesopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+find+volume+in+mlPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBF 10328 bytes
SHA-256: 444ce65e38bc88fb632618b04c8dfe2d3a2ff189c47e0cef07190d6c5e0e724c
font_01_sfnt_off000122f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F6 20316 bytes
SHA-256: b88259f213f039cdad82107d5e9ac5cca73f27716dd06f34b334a7bae5888bb3
font_02_sfnt_off000158bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158BD 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
font_03_sfnt_off00016de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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