Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d310465b85892ba…

MALICIOUS

PDF

83.5 KB Created: 2021-09-11 17:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: dcbf8a89f5f0064c860d5710e0ca878e SHA-1: 0cede654cd99eda2ac5b8cd6dec6773b3d27b774 SHA-256: 5d310465b85892ba8b05af19a76cbab7c904de7e01293f162604dd0bf4414d8f
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9977

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 https://pixomot.ru/uplcv?utm_term=the+oath+of+love+ep+1+eng+sub PDF link annotation
    • https://mygoaltv.org/ipp/images/uploads/files/58238142419.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/62576486267.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ilrr13jbcia0rnebuh87kqfnc5/gokunurum.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/39462080464.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/83618025545.pdfIn PDF document text
    • https://mauspro.net/upload/files/33931536533.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/36731607233.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/73254218976.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/27004743341.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/torinira.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/13838124415.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/87336979368.pdfIn PDF document text
    • https://unosms.us/userfiles/file/50511937702.pdfIn PDF document text
    • http://theofficeplus.com/userfiles/file/61297123892.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/54714895298.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/vaxokizebuwu.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/manatubinemuwosazudex.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f35ee53b38---vagugi.pdfIn PDF document text
    • http://okgwa.net/50/files1/file/wexesosilolekanopubuzo.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109071253206182.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/32830344149.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/nuvujavekinofu.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/kifefemawifavove.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_off0000d7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 21184 bytes
SHA-256: b07dfa211d65e1d18df3a400d685809818d0a236b9fe30778e53fd7bb54fe36c
font_02_sfnt_off0001277d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277D 10768 bytes
SHA-256: 0288908a172ddd0e0aff7286f0db1e2a3d32b9571500069e3f8172eb826ce711

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