Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb2a449f3a78b6c…

MALICIOUS

PDF

95.5 KB Created: 2020-12-28 17:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1d3b5222e307a1ff8fccc4e035777e76 SHA-1: ea2e00479018dea5615162c7f31dd33062ea6443 SHA-256: cdb2a449f3a78b6c07ac88396535aa07c3d23d5fdbf429b15d64d42c1aa86b7e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the ClamAV detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=autopage+xt+60+manual PDF link annotation
    • https://nukafubesogu.weebly.com/uploads/1/3/4/4/134463640/3cf3b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_5fb2a704ab37e.pdfIn PDF document text
    • https://zinuwikisabarek.weebly.com/uploads/1/3/4/6/134679236/wivapituz.pdfIn PDF document text
    • https://cdn.sqhk.co/pekebugus/Phd2Egj/bethesda_prayer_hall.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f93a30b83b32.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/Kk30Uhe/47690721431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465007/normal_5fe2aeaa04d5d.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/wibedubosateg/zovikuwejazur.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/excel_employee_schedule_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8829b8-2f6a-45ac-850b-aaeb0dac86cd/gopitabevoziranis.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_off00013919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13919 5220 bytes
SHA-256: 6832d68e94d0d786c6e8d56515bc0162a875a956c7c3f44c6e47b7e9cd142505
font_01_sfnt_off00014ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD5 11484 bytes
SHA-256: 22d9b443c283451610231e4f45abda29457d3fe59a2a49515753d3672d379ccd

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