Malicious PDF — malware analysis report

Static analysis result for SHA-256 236ca2502732b488…

MALICIOUS

PDF

75.2 KB Created: 2021-09-07 03:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 03b1f39c1d6856b3f6503a748d2d1cf1 SHA-1: 5b15cbdae407b896598f5fd611d6806430260d71 SHA-256: 236ca2502732b488c36c7edcfb99807c97048e4e7da2ee1bcc80478c2933dfdb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The file leverages SEO poisoning and link farms pointing to compromised WordPress sites to distribute a malicious PDF, disguised as a free download for wedding photography poses. The embedded URLs are designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/82010859583.pdf In PDF document text
    • http://myucmas.com/userfiles/file/lilaxenisurite.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/75f633ba923703d09ba3276e23450b37/pokabofologasenapisowuwel.pdfIn PDF document text
    • http://ccshecea.org/upload/files/53209017767.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedd743d925---zibemeda.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210830065411_b323ks.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/81445005865.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/28953045747.pdfIn PDF document text
    • https://hoavily.com/uploads/files/kudinevazamoripemarobemix.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/33297427088.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/c5aqntt1oplm178pg4aqhrj981/61055639225.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/mipale.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/gijuvesemilidijirenarov.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5f7a314bd---digosoxidezupuveluf.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/98556788464.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/75620914175.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/jeda6ad82fco6l22sq45i2t7u7/jejoferipulukiredarexekeb.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/81220592037.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607562a1f0f1c---16962086436.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/gutudunajakimuf.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/jazikudodazitokawumobawu.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/63072141918.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/87881694130.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a7ff2e6485---98981897413.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/78681308971.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/l74p1d4hnp7e921jrmdiupv36j/xamodiwebanopokerufut.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ffa13fdb6df6e0cfc0fc925e6b04127e/94047280550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=wedding+photography+poses+pdf+free+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_off0000c29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 16112 bytes
SHA-256: 0c7b61ab305d7ac079085c6308893a7cfd823c1f785caa506bf1a3876d88e6e7
font_02_sfnt_off00010424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10424 10968 bytes
SHA-256: 656a6f1d268c79ffe55f720c6ce7b17f49d093560e0db2728e2408f840bf73df

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