Malicious PDF — malware analysis report

Static analysis result for SHA-256 006341c95000c203…

MALICIOUS

PDF

91.6 KB Created: 2021-07-08 17:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 26c2bd14ca48e220b83ee38d2fa4b615 SHA-1: 2b64f78dc953bacb7e67cf36c42912511fe9f6ed SHA-256: 006341c95000c2036a64f8230df72ef9c23c0cb8d183a1116d89a1dcc35c4622
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. The presence of a link farm on disposable hosting and compromised CMS upload storage suggests an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3412057dd---bozujugesabenad.pdf In PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080573f75264---kotovoxaf.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/99728355306.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8ff07f3a---tatujelem.pdfIn PDF document text
    • https://dm288.rs/slicice/file/49703329513.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ae9eef935---jegotagakebilavesotuvizo.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/29737915296.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/dfe31a2adad137e1d4b0011fde86c1cb/10391528049.pdfIn PDF document text
    • https://tepihtrava.rs//files/dolaxidaperavofe.pdfIn PDF document text
    • https://edusfera.pl/upload/file/13305965812.pdfIn PDF document text
    • http://dges.in/userfiles/file/wazaxetu.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c0f4d04e9---ragadotok.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a608e5d29816f83ae6ba00104adda103/95718004928.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/6bfm781rpc709kfjsvthr26rbn/19343582504.pdfIn PDF document text
    • http://chromavials.com/d/files/4041726780.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/17344494485.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075b4bbc9611---dixekoxoguvanusatuzi.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/bitisekiror.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/kodebutabivelamitav.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/649a168940468d11e065457c12cde1b7/62814490760.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/usfmqr59clqgvb457lucq7900o/39091896642.pdfIn PDF document text
    • http://pattersonandoliphantfamily.com/clients/875492/File/marofa.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094db0006b50---69844063820.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/gefevofigexa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=data+science+automationPDF 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_off0001046e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046E 17948 bytes
SHA-256: fd8bf3215defb818c6fdaa63e20cb24375c3b3f62935a8c3c832b9704eb1c852
font_01_sfnt_off000131d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D3 10344 bytes
SHA-256: 10033697e6c3dc4b91371d725e6550a5e404b5ad80094d58c9ff9916a84c998f
font_02_sfnt_off00014939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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