Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee859e1cba7a818…

MALICIOUS

PDF

75.7 KB Created: 2021-09-01 16:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 756ae659dcd5da765b1f67602b6f1c22 SHA-1: 8f6fff221fbebdc7259953462c3b183b0bc34db1 SHA-256: 0ee859e1cba7a818d23c72f32427886649db4e2b12720add9b173ca17559e5ea
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be SEO manipulation or directing users to potentially harmful content, rather than direct exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://sedefartphotography.com/resimler/files/61690389993.pdf In PDF document text
    • https://badrivishal.com/media/63904533147.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/crkgrvudfnkrrna5tfiobuc97h/fugajajami.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/1974000762.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/volek.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/34535449216.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/vd60e5da8n2t225u0tmg6bm6r0/35118545093.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/8ee08051e6a317e5057e3164c98fd1c5/poburamitaminexukodaj.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3eede0b456---18165214843.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/65727097076.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/67530758965.pdfIn PDF document text
    • http://mfahk.com/upload/files/68061570406.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/59309555227.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a294b5dbf79---gomizirujazajofupapenixot.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/00b929333d445a3dd8fc3455948f3510/63330770637.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081f103ad14a---63651816262.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/nm8s15q2aot3rmn743d3e28vs9/sojepunutipekivorinez.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/niwozilufotijil.pdfIn PDF document text
    • https://caffedisanto.it/file/takudozutawuwawokad.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/19541159555.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/zeropezozulozorit.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/7b1b9e9c4a46272c2a1f0bb545b99c51/koxozux.pdfIn PDF document text
    • https://loctra.net/userfiles/file/wunuwamexapijixi.pdfIn PDF document text
    • http://itena.si/uporabnik/file/16706904114.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/xelerubisikexaderopewib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=streaming+overlord+season+3PDF 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_off0000c026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC026 17840 bytes
SHA-256: 20e54421cfc09f76afb9b1378c4a7e7f7df77043e5f171e8cbbdc4aec0e2216a
font_01_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10624 10904 bytes
SHA-256: 818431baa65c58aceec47a5765ab5e2a66fd0f20dd50be7f01f65f04a1fd70b8

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