Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3011703c18afb6…

MALICIOUS

PDF

83.0 KB Created: 2021-09-15 17:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 2258f2b0f26788e8914dad61656818bc SHA-1: be17d6104448dbe812ace356b733ac9d2de494c5 SHA-256: 2a3011703c18afb6471dce6b11a8da4905b81278699c2fc02f1230d9a0ea5775
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=pomodoro+app+android PDF link annotation
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314448228c1---47553796494.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/11642352788.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/45105401055.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/wonajasokek.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/bajoxivujamizumivuwakapu.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/98250408933.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/63019585032.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/xuluginunatuzawenuwami.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/pewikudaxo.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/zivewukutujufe.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/d1e11dbc8151ef15483151a6c7eef4ab/80503056697.pdfIn PDF document text
    • http://securitydm.com/slicice/file/kegefotifaguzi.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/55530607578.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///2298661720.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/74152726267.pdfIn PDF document text
    • http://medi-sen.com/files/files/tidaka.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/gufenixuwakuvububekeri.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210913131739.pdfIn PDF document text
    • http://santeh.md/img/files/75761138828.pdfIn PDF document text
    • http://euhoca.com/js/ckfinder/userfiles/files/36547945698.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109120235013899.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_off0000e180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE180 18056 bytes
SHA-256: 8ca8314fd3b3f836c7523da8318612bec76ba728390a060973083b8e130c5928
font_01_sfnt_off00011074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11074 10108 bytes
SHA-256: 96e56e87594e6433ce6d666667c7010183c10e9086dcbdf80f3b2f9838082948
font_02_sfnt_off000126d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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