Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb24196fbecb0704…

MALICIOUS

PDF

75.0 KB Created: 2021-08-23 13:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ef6f4cb72e801c3b049d509a3fd7ddfe SHA-1: 62d3d26b1a468cdad81846c4e4d41734da06cd6d SHA-256: eb24196fbecb0704d6bafb3d185eea0949f0d89c184799997cc09a8a6e1d4b38
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and other disposable hosting. This suggests the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/eg147pt0rocortsevbfim4l0q0/82370066107.pdf In PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dde4fe382fc---bomegobonosa.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/pujipexep.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/44640590334.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/fiwidawudizis.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4430dea0b---runitivezewipa.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/73604201479.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/kegizadux.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/55581090765.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/28945470831.pdfIn PDF document text
    • http://teresachild.com/upload/files/59849528997.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/jabuvabeperesozamulutes.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/92484860161.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/33235589599.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/jagomali.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/ka91pkg8360kkm6bh18379qqs8/18229383363.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9e1528e84585bd9f750d24bcfb480b86/netidejutizawelafo.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/katejoruxerex.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abdff955d20---wuwetekegixefus.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161200e9d9c6c7---lakuwikize.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/37999562931.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dc3c72686---rurom.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/sawuka.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/xekibonatuletibar.pdfIn PDF document text
    • https://phr4u.com/files/53204057878.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=baka+not+nice+live+up+to+my+name+mp3+downloadPDF 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_off0000bfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA5 11092 bytes
SHA-256: b6b3e7d94d1666ec53dc3b30a94c3d065620f43a7fa5c6365446d9faabb0e365
font_01_sfnt_off0000d99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 17084 bytes
SHA-256: da921aad41b70e5120c14db1a96bd97f55efd1cb7d8aac9d6120bc4d7913dbe3
font_02_sfnt_off00010674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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