Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2c2d768afdc7f7…

MALICIOUS

PDF

125.9 KB Created: 2021-01-31 01:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a86bd7ddb152f8285ecb4f095ded22ee SHA-1: f5bce440577637e8b339e4f0e227c8b93cbdd9f0 SHA-256: 2e2c2d768afdc7f7478b28bb9cdd9f40531012a96fa1f1d15fed3ea0d265ba32
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure itself is designed to facilitate redirection to external sites.

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://ggtraff.ru/wb?keyword=formula%201%202020%20constructors%20standings In PDF document text
    • https://static.s123-cdn-static.com/uploads/4478703/normal_5ffcdfa59010c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5fd204ffb4326.pdfIn PDF document text
    • https://bojepelesu.weebly.com/uploads/1/3/5/3/135350442/luvevemilunu-rabirez-kifepeze.pdfIn PDF document text
    • https://vaxurubezinijor.weebly.com/uploads/1/3/4/6/134690270/3326648.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454171/normal_5fcdf5cfd4533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_5fd922faab7f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fcff4124c1ad.pdfIn PDF document text
    • https://ribiridoxa.weebly.com/uploads/1/3/0/8/130874248/gofoxav-petub-wapemuninin-xedureka.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/1304657.pdfIn PDF document text
    • http://nidomamedop.22web.org/birbal_kannada_full_movie.pdfIn PDF document text
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/6049473.pdfIn PDF document text
    • https://lulexabike.weebly.com/uploads/1/3/1/4/131407361/moxipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajiwewovipu.epizy.com/50028083221.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/dental_spanish_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/fisuxuxorojimibabak.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/pap_smear_guidelines_aafp.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/60466200468.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BCD 5280 bytes
SHA-256: 39bcaf29f6279a5269d2e7a2bdd74a27082fa0ed44d45f95b9a63a38e2dddcfc
font_01_sfnt_off0001ae3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE3C 5540 bytes
SHA-256: d0d9f869ac2f50f417a7089d85101d1bf80a7d307f4fe7998c6edf040af9c269
font_02_sfnt_off0001c0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0FB 11992 bytes
SHA-256: daf0fbde9bf3aa5a5960616a5c7b581954ccd6ccc31960e49a00f164b3da2696

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