Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc74110ada9ab214…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 01:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 08f1802d31e9f15c6d298fac94857068 SHA-1: 2fea66028d129b9c87c7e8c3dbe5239d033a1182 SHA-256: bc74110ada9ab2149d9dd90c370f0cc51c2fb6b3adc3c64e42a981972ac4b5f9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage, indicating a link farm designed to lead users to malicious or phishing content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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 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://cam-ceeds.org/ckfinder/userfiles/files/mozujipatimelutitesiwos.pdf In PDF document text
    • http://automotiveenergy.cz/userfiles/file/bivirumapoxoxedexapexiwal.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/64872574659.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3065d4525---24600125318.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/zinebinekagagezu.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/da22c64ae2a71af7cbc34b073ddbb3e5/lonepozemidexatareru.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/da7d16d2ffd0e3bba2b0fd917a5d4ac4/54719858810.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4b9de57ff---jizirozologisijok.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/25531020562.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf9e764ed2---28321639955.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080a36192c13---2434445730.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/680ace25cdf0ede91498136bed9cb5f3/tekixisofijopaninitokavo.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/vabomonili.pdfIn PDF document text
    • https://quaint-house.com/images/blog//file/visokukemutasakidoge.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae1657ab5---vipufidototerafokakija.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/af065839bc21fd62374d9238f488a1cc/5136684889.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b2853c3b8b6---95404470989.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/mizurefatelorajotuvo.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/8e68330b98e7c93007b73ff7f91630c9/72876865576.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/lon918a4nqfqkmpru5dcpj68fu/5027119005.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/47907873721.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/49643456580.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16099bfb17c6c2---5609047052.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+smart+money+woman+by+arese+ugwuPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d46dd29095---degeb.pdfIn PDF document text
    • 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_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 10820 bytes
SHA-256: b6dde1c0b71215d04c375db6a6301b97dedcf56ff3a9bccec62712e4a77b6549
font_02_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 17808 bytes
SHA-256: 04455e74d0c46a4acdec9df7d34ac6d8a9be97f1722071541c3ee1ce05a80e9a