Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e2fb567528d8e4…

MALICIOUS

PDF

115.2 KB Created: 2021-06-30 04:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4a58ab08ca0d1ae06a0dae617f1a75cd SHA-1: d8284886b42e064ebec58a699551bb494197b7f9 SHA-256: 08e2fb567528d8e418be4cd7d065bc60ba87c51ec1b26f4b73342943fce75d21
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609846b820867---75929179209.pdf In PDF document text
    • https://anakaygame.com/calisma2/files/uploads/zekaxigomamop.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bujulemilekuboximon.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/b72e2b635dd1501fa5b4b3ad4f7e2874/41492917718.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0adcd22fe---mafopum.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdeb9d8c4a---27041357604.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/747c4500b7b61f7f04f33b3fbf79fccd/losijebivese.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2a1e90cc6bb555ec6d4ddb5166379946/9988110269.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/k03492kkp4dqeop4q6mp7tbqc1/57254556941.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607863a903f95---deduxazexinivinokawosaxu.pdfIn PDF document text
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/batetekalesixiloti.pdfIn PDF document text
    • http://katheran.com/clients/55933/File/52406776977.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/71853390413.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160973de459587---29400723894.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d7dc72ea0---losasezulowis.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a230cd59349---wetumijale.pdfIn PDF document text
    • http://intergeored.com/upload/File/gisusad.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/dujigesegojiwirane.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d355b7b7474d766b108b4ead4d052a90/zaroritoxavekorateta.pdfIn PDF document text
    • https://medius.sk/userfiles/file/65992927453.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/42059500744.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ll0fp7dhb70e3mjdn6v64u9jd3/xesekegujimilupusi.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bd4532581---79213604427.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/walusuwab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=geez+meaning+in+tagalogPDF 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_off0001393e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393E 16248 bytes
SHA-256: 1b5d9e1c6f4a53e2d764be52277ce8c78b384e60cf289ca3275c6bc1e37c33eb
font_01_sfnt_off00014f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3B 27940 bytes
SHA-256: d6e76f437c325144ea9bd477cc29f007459239108a0264f07a941b6b528314a1
font_02_sfnt_off00018fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FD6 10280 bytes
SHA-256: 6721f157c796ebe0ece4a3e30ae0346c3e62ebe43745a583ea12cb0ef5855fdf
font_03_sfnt_off0001a700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1