Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7b0b5801bf92a4…

MALICIOUS

PDF

85.6 KB Created: 2021-10-09 08:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2d8b97822eb5e8e83b843006e1152446 SHA-1: 52a414530fbcafb7175f1b225f70b2adce2714f8 SHA-256: fa7b0b5801bf92a494269ea7cda3b27e1e240cb2eefab5ea141bc5bf7a2767dd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://wastran.ru/uplcv?utm_term=wild+magic+table+dnd+beyond PDF link annotation
    • http://serramentisiciliano.it/userfiles/files/43802496504.pdfIn PDF document text
    • http://epmachine.ru/d/files/megabebavetuwemujuviruwes.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/56003027112.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/pavegabowakutazoxuraros.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/takito.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161559ef6a66c9---67829785685.pdfIn PDF document text
    • https://kuwaitpolyurethane.com/ckfinder/userfiles/files/mipexixugoda.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/pilisigokonoxoxixilupep.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/bakufaguvopuraruraleguri.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/razevuk.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/fawulevojulor.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/zedim.pdfIn PDF document text
    • http://automag.pl/userfiles/file/73154159420.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/52407861059.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109251313324940.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/komexuxomulibuwagekixa.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/budatavaligojimofuxazali.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/janasazubamuxelasig.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/fe1fu53dob6sbmt091f03hrro2/maxip.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/26793872516.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/kepup.pdfIn PDF document text
    • https://bagstyle.uz/images/file/35190072738.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/4982123440.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_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 18552 bytes
SHA-256: e2c4d11b7c79bec40e9cf0a8845b9ccedd5b699fed53c68e98988645ed35992d
font_01_sfnt_off000116d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D7 10692 bytes
SHA-256: 76bb499e166a0c9cdbbad9a794d1f7db437d579996cf35f241a9a6f17eb41128
font_02_sfnt_off00012f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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