Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65c7557050d6874…

MALICIOUS

PDF

65.0 KB Created: 2021-02-13 00:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3bd7d395d94ed92eae2acb6f102d9f99 SHA-1: 9747eb008a48cca5904544b8d9355e6d68d9e8fc SHA-256: d65c7557050d6874aa9eb870e30e3bcf895dd56bdbbc328e9e1d9118a4c01ffd
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' suggests the document's primary purpose is to host numerous external links, potentially for SEO manipulation or to distribute phishing lures. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malicious redirection attack pattern.

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/123?utm_term=point+blank+r20d+outer+carrier In PDF document text
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/gaziragipolefadija.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/1199583.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/4713149.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/8445606.pdfIn PDF document text
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/nurifima.pdfIn PDF document text
    • http://robertferrell.net/assonance_consonance_and_alliteration_worksheetokhko.pdfIn PDF document text
    • http://detonicro.website/23955358426h2cxp.pdfIn PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/1c367b09d0.pdfIn PDF document text
    • https://wipasokewuwil.weebly.com/uploads/1/3/4/0/134000036/roxepinijuwe.pdfIn PDF document text
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/8020515.pdfIn PDF document text
    • https://rirejanumaxix.weebly.com/uploads/1/3/4/6/134631236/dukifozup-madulutota.pdfIn PDF document text
    • http://winoraama.space/vupib46daw.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/savukojubusum/avast_mobile_security_pro_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/weekly_calendar_2018_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/alvida_alvida_song_songspk.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/igneous_metamorphic_and_sedimentary_rocks_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/tomcat_8._0._15.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/achievement_cv_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/dj_b_bashment_riddim.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/80112213402.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F1 5232 bytes
SHA-256: 65acf229231860485a2714db7bced29700bc0bd8d35c23ce1fb54f6d763881f1
font_01_sfnt_off0000d5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 9716 bytes
SHA-256: 0e8f8827f91e94734275ea4d43febcb5138ce155fdc45f0e4a98f3a3fd9c410c

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