Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2f46edd8e79cc5…

MALICIOUS

PDF

70.0 KB Created: 2021-09-14 01:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c2e3c431e179cef304e6f800ee669ef0 SHA-1: 9f0241ab6ffcf17a1527d41d43aa2f36c16c8912 SHA-256: da2f46edd8e79cc588d625b21748b6c8c1cc281cb9b3655d68ac6c6bb1c3ab99
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. The embedded URLs, such as http://kssi.ir/public/userfiles/file/nevamufakis.pdf, are likely used to redirect users to phishing sites or download further malicious content. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kssi.ir/public/userfiles/file/nevamufakis.pdf In PDF document text
    • http://sunrui-ti.com/d/files/45929998329.pdfIn PDF document text
    • http://asliev.coco1490.com/upload/file_folder/file/vejubosixu.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/tuwozomojapowawutan.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/dedezabofiponebapapar.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/12085856103.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/zujuj.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/wuxazozabokisukita.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/16384531208.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/junijijofunizabukegi.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/migifalow.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109140509131114.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161333920ca48d---zidarelepuduwuvegezava.pdfIn PDF document text
    • https://etadelloro.it/images/file/vepokorotimi.pdfIn PDF document text
    • https://maturana.cl/upload/file/dapolel.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/xirugerupabukotororogele.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/kerapevemubofis.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/pokalagigepi.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca307b6b11---pelisilubu.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/jukuduwazetedelatiwetuv.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/66193643203.pdfIn PDF document text
    • http://freewest.at/tadiwesoriwamokagoboj.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/25397944335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=mario+crossover+onlinePDF 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_off0000b3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC0 15592 bytes
SHA-256: 75ebc92c50891ee8151901afaa3984d8638a123d7074d9cc1e324bdbf235e560
font_02_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 10184 bytes
SHA-256: ad481cd730dd91a138e3af165699a56f403928833ed80beb679dd21c15f9cd07

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