Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3cf9b02a313e73…

MALICIOUS

PDF

72.8 KB Created: 2021-09-21 15:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 88b5769a13045e9616c27ef629aa0aa8 SHA-1: be3d974de74ce46b94083b6148b24e42f2ac90ba SHA-256: 2f3cf9b02a313e733a3a1d077afe898bfea71546bbef7a00c1302d1678054df5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gocep.org/data/userfiles/files/tavuriwubelofasiwitili.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141074ac669d---60320013781.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/piduxego.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/5951732427.pdfIn PDF document text
    • https://interconformity.ro/images/file/30649519333.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecf2cb6259---zozuxumifodapavi.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/lixepu.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/43467421773.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161483069dd3f3---zotogolugipur.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613887ee25758---6939138903.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/najeguj.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/96249711229.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/tudafulufazeremozigodo.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/foveletozivuf.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/86763420420.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/49960949259.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109122137324434.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/kupulus.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/zusujotobuzitaranonapaza.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/31943163488.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/83982862959.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/em084jlp065oo290h29ivvmcnb/91870826586.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/gajuvinagotudebakuso.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/48352137129.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/28080105217.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/81593559925.pdfIn PDF document text
    • https://manhremhoangvan.com/wp-content/uploads/files/90131855436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=jagga+jasoos+full+movie+download+720p+blurayPDF 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_off0000b912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB912 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD124 15696 bytes
SHA-256: cbe3a39c5d26bcafb71ba3cb9a6875f5b3afc65427ad0a54cdee531a765c64a2
font_02_sfnt_off0000f93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93E 11660 bytes
SHA-256: 40da70a06190741f49c1193cee005db5c448fc47b29c6b7774418784c21707ad