Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e5dee5ceb01143…

MALICIOUS

PDF

81.0 KB Created: 2021-02-14 17:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b770f4a97b54350f4846a46b155716d SHA-1: 0825e08c0ce155cac2b61510f91a24d5221a5f26 SHA-256: 55e5dee5ceb011433ac476dbb7d4cf43f2cf863ea107c229bbb2be77384e8ffd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/aws?utm_term=fox+sports+tv+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4415531/normal_5ff2774dc9323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479674/normal_60110d0e0e47c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447487/normal_5fc7572d29f38.pdfIn PDF document text
    • http://leafester.online/vomipelalasebivokugejig8unb1.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/pcp_pneumonia_treatment_guidelines_idsavia8o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5ffff5196c525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5ff782589a6bf.pdfIn PDF document text
    • http://snt-br.ru/adalat_20_mg_bulaaxg5m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5ff16c684c2b8.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/takateg/auditor_report_example.pdfIn PDF document text
    • http://mekidojakad.rf.gd/adcc_reporter_gene_assay_promega.pdfIn PDF document text
    • http://vegigekud.epizy.com/seizures_in_dogs_merck_manual.pdfIn PDF document text
    • http://rufegojokod.epizy.com/letter_i_worksheets_preschool.pdfIn PDF document text
    • http://befadiw.rf.gd/centrifuge_machine_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/spotify_premium_apk_hack_pc.pdfIn PDF document text
    • http://zixoridepub.rf.gd/popejebit.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/95197341708.pdfIn PDF document text
    • http://dimesagir.epizy.com/pelanesupun.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_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 4968 bytes
SHA-256: bc2f4275f55b4ca6944f6124c1e3423fc3e5cedc925183570364820d60e16a2b
font_01_sfnt_off00010ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 11556 bytes
SHA-256: bed47d773836d9e1178a4681b970ea4a1b976fbc7403ae6becffeb28f07847ca

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