Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d75e93d761547b…

MALICIOUS

PDF

79.3 KB Created: 2021-02-27 11:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 92f4a8f0cfbd218407bc85b723315a6c SHA-1: b91a9a32356e551515c0e53e233994ec1364a3de SHA-256: e3d75e93d761547bd6204a8e2708505bf2dc81cc3de55a12267f2f7fb853a666
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a redirector link to known malicious infrastructure. Another critical heuristic flags it as a PDF link farm, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/award?keyword=how+to+place+fingers+on+violin In PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_601a9c490f8b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5fca83b78a114.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/jetixuzopenez-varudopux.pdfIn PDF document text
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/77582.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/5347471259.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/tijajexa.pdfIn PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/242af120211bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459791/normal_5fef9a3ddf968.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368487/normal_5fe17c2fa26c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445103/normal_603889958ca46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/management_information_system_l_g.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/what_are_the_twelve_steps_in_aa.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/latest_android_software_version_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/craftsman_lt2000_20_hp_for_sale.pdfIn PDF document text
    • http://girofili.myartsonline.com/new_york_city_map_sightseeing.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/cd4053bcn_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/2389859739.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/13719107522.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://scripts.sil.org/OFLIn 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_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5296 bytes
SHA-256: e1597e1cbcde16e3d4b349224e35e95323fd5cf76a1b5d50d540acad5f057b51
font_01_sfnt_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 10544 bytes
SHA-256: c586fe7d05ea36902d4191bd835bbab857f90740bd7a181f872e39552b828777
font_02_sfnt_off00011ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 16120 bytes
SHA-256: 46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12

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