Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1071de834f5b6a…

MALICIOUS

PDF

85.7 KB Created: 2021-09-09 23:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2e88ba7f2ec334610c1ba3ef2e573737 SHA-1: efb7639f9c8f60421b256a9a63a6fbb1b3e11045 SHA-256: 0c1071de834f5b6a9f2431cf34cf47448a715f38d2d72a0bc6b4d2f4739c3665
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://huntic.ru/uplcv?utm_term=gta+sa+no+root+apk+download+for+android PDF link annotation
    • https://masihpt1.com/contents/files/ruxubam.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161393ac0640e5---kopebewitazidal.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/zajijukigawodiluwodavoma.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/2490356323.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/34423600707.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/figuv.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/bidazurerob.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/22975165315.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/14121944306.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/wofibifukuvodagezezapebi.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/pekaz.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/magefiwesugefegobum.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/912cf2610a7b5f843c6c0d2fdd3621aa/sufow.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/buvovave.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/35964818161.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/81203354208.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/36778060063.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/gavenesulevuwavizigi.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/gipumosewufofafogewuwajav.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/7111860960.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/7125038639.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/68853183340.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///jokemodipewime.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/24472523609.pdfIn PDF document text
    • https://easyown.ddproperty.com/datas/files/85473226904.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_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 10576 bytes
SHA-256: 3f00c2ca5b2188f988470a873a4df7f01f55eb03d7dd42e4f67053e53cdd4e37
font_02_sfnt_off000115f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 19452 bytes
SHA-256: 252bbc2c6466e58df70c2c8531e27344d7f35c2a4e037f61cd2882a41ce6fcea