Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1dee2c53712cfc…

MALICIOUS

PDF

124.0 KB Created: 2021-09-07 09:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 33a153f3dd9dbe55b455acbdc1136213 SHA-1: 71f0f3adc3f3dce4975bd714874a715ffec38333 SHA-256: ba1dee2c53712cfc813fc92e742b8b02306628d58387defce84766caa15cbe4f
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. It contains numerous links pointing to compromised websites, suggesting it functions as a lure to redirect users to potentially harmful content. The presence of multiple external URIs and link farms on disposable hosting further supports its role in a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://cructi.ru/uplcv?utm_term=sufism+and+islam+pdf PDF link annotation
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/a0b089e7f395a501a92618c4d972b530/55752044080.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/rewalokoxuzikigetiw.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7b2237382---16356620228.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/88306683221.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/39018877017.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/tutododesitipibe.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef6c175b10---39086664912.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210622_E790BC2575AB7D4B.pdfIn PDF document text
    • https://doctorchina168.com/upload/files/6603126264.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e081c6b12---detukepelalifajona.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/30447017805.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/32996704663.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f99ad4e08d3---bonul.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd69a6117c0---74163754517.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3088d7b76---bazotoxobenozosemasafo.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/kunetavajexarisiru.pdfIn PDF document text
    • https://orrizon.ru/images/file/15263936040.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/sizovi.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/37a7fa18bd472a89714558c1208e2d22/leluxifos.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/masiwaroseminifosop.pdfIn PDF document text
    • https://badrivishal.com/media/samenotogimuraditir.pdfIn PDF document text
    • http://npas.ru/pic/file/85437510349.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/78752427813.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_off00017c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19492 21444 bytes
SHA-256: 67cfe55ad6708719dfac3b7bb5ea0c504701d44d99383cd4e7f4fff53b41f8fa
font_02_sfnt_off0001cb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB1A 10384 bytes
SHA-256: 7919702a40362b78593d0ca5c568b06a8c322f71df988ef8795f6bb95ee074d9

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