Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f00b1ca4e80589…

MALICIOUS

PDF

88.9 KB Created: 2021-09-15 15:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a5c846e031f010c0e27b62459c2e7f88 SHA-1: d2efc36642b362ff29e608b513b716839436ff28 SHA-256: f7f00b1ca4e8058937315b97d1604c569b9370a0c38276c641dcfb29ab977a2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a ML classifier and ClamAV. It contains embedded JavaScript and numerous external URIs, indicating it is likely a phishing or malware distribution lure. The document's structure suggests it acts as a link farm, directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://laborke.ru/uplcv?utm_term=watch+the+other+woman+full+movie PDF link annotation
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4012886510.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/tutesekulevibijuf.pdfIn PDF document text
    • http://93564497.com/userfiles/faxeneruwibemexa.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16140f41a7080a---10455119794.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/zedin.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/fabep.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/97512002462.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/25223853034.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/3888bc39a4fcacd563a735e8ac024208/tasejuwete.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/63300657447.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/74798794657.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/38219518386.pdfIn PDF document text
    • https://comfort8889.com/upload/files/72582985224.pdfIn PDF document text
    • http://360global.ca/userfiles/file/62149298330.pdfIn PDF document text
    • https://kokomanis.com/contents/files/83486728628.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/wawogojumumogapirixi.pdfIn PDF document text
    • http://topmebli.com/content/xuploadimages/file/jatebisivumagefabegon.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/tedazozowuvepotenirato.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/43686764686.pdfIn PDF document text
    • http://wf515345.tw/CKEdit/upload/files/39582626011.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/26541640491.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/gubinowewetemut.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/80482445112.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/63438603418.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_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11071 17668 bytes
SHA-256: b8570ab726347004ae45b305c88f6c321274f9325706fb8150bd5a56a6f930fd
font_02_sfnt_off00013da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA7 10680 bytes
SHA-256: 8ffff0893cfc31094ee5be4a66597853352b8da209137e64ea5037932f1d2efe