Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7692a812ef9ea95…

MALICIOUS

PDF

114.6 KB Created: 2021-07-21 19:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fb4ea481f9f27ed6ceabff32de23b971 SHA-1: cdeb76e253ee9a5aa90ad71a8755e227d2e36832 SHA-256: e7692a812ef9ea95f6bba02985a887fdb26ba91c97be83b64b5bdc7a7e309450
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/cd14e4f5ad2956901981d0b0c9de2d2d/18714988993.pdf In PDF document text
    • https://restavracia02.com/userfiles/file/71046233001.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/64153195896.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/f5e117da17712ca3ce36bfb4ede26e23/zugisefumovemurafodosav.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/a7e3ae96ab4d577cea24b8b092d06de0/rolisixufel.pdfIn PDF document text
    • https://bczenekar.hu/files/file/vetazimijelot.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/62044176057.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/0a92efb2d6d7137081e7074c6d504cdb/rofoperilekoba.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/87b60c129646142a756fcfe63674e8c3/93820895733.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/7f37cc827ddfd9b74f7392b7bec4441d/32609268022.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/bufeja.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/64459831080.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/afi6ic5qcfe9a1g99u02499ds4/31496323370.pdfIn PDF document text
    • https://2acontractor.it/images/file/sidoki.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08ed784cd2---35556901852.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084faf7a065b---50914129228.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715ee40e874---vimitojojopedolojin.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077218e15311---78713821770.pdfIn PDF document text
    • https://kiameds.com/images/upload/files/radezusidagazisejera.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/xibevoxuxezimibarelup.pdfIn PDF document text
    • https://tomas-music.com/contents//files/24310090993.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/71861004936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=24+form+tai+chi+for+beginnersPDF 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_off000111d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D4 10980 bytes
SHA-256: d98604840a5ffb5d287845d45457b89ae169ffa55dc9b8943d4c3bbb6223a26b
font_01_sfnt_off00012b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14349 20496 bytes
SHA-256: a6047c09725718d2b2105db765ebd1b4e2e2c82670d60333adff9ff657c7f9a5
font_03_sfnt_off00017573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17573 25768 bytes
SHA-256: 07cac0310cd1258bf3440ed1af6c734a6d2c6e23057add022977067be12c4a1c

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