Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95527587ec8f4e7…

MALICIOUS

PDF

94.5 KB Created: 2021-06-25 23:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c113d98e3e1b59bbb6f3438c55d9ef87 SHA-1: ac7a23ad9a6a9c7a21ba621aed1fba15fb591717 SHA-256: b95527587ec8f4e75119c7d6cb257cbf92302da5176aae55a5519b21681cba82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites hosting other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URI heuristics and link farm patterns suggests the document is designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d38930b1a61---weridanipiruguduzozuga.pdf In PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c147a3667bf---80975492060.pdfIn PDF document text
    • http://namhunglogistic.vn/site/files/gamazafigokes.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/77734079378.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608485dc92fab---50147681304.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/kugopolavosifaguvavan.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ab42695ad---bemodabemujelo.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/0ab94bfa505c258758a16ffe4e9b01db/nibababariw.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/60174547956.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4ffd988af---mopasigepifum.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/5bbc2bc5c025a3c7d24ab0903a4f2e0c/35274345958.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/68945377831.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/14673775151.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/0jdiou4k5gack8evds1d1ethdj/14990127157.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b750461ba---89127967877.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/22207426447.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160705b216c836---25306216649.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/9st2ofqu23jvlbbv71olt0g1n6/fafabediga.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/biduxorinu.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aeeed66f487---fudizirixisujo.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/2232827956.pdfIn PDF document text
    • https://werbemittelag.chupload/file/fejezonebo.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af4a341a231---29235077218.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/cp6anj33oun9man5lo2hms8hm4/85010019590.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/xukinexabilafajurotara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=mississippi+river+widest+pointPDF 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_off0000f786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF786 10324 bytes
SHA-256: 9689a25a6631a66bbbe03a8db744b6678bafbb52e845dc4d2552bcca8120570d
font_01_sfnt_off00010efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 17228 bytes
SHA-256: 887a79895188b0b0c7837130570a499613f9e09ed4cf4841a799a2c0eb4dc4ac
font_02_sfnt_off00013beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000153fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153FC 16400 bytes
SHA-256: e7a37577ba2a30d0a21bb681a7b7576409f500daf7f552f2d697e0621792291c

Open this report in the interactive analyzer, or submit your own file for analysis.