Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ca3a694e1c292f…

MALICIOUS

PDF

88.0 KB Created: 2021-02-26 02:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 019fa52b99e6e3766ee03b20335ff4d5 SHA-1: 19541273b2788080ed48f5cf6b0453ef88e46cda SHA-256: 26ca3a694e1c292f38262c7ca4aea94779bc6d676f3535e50d5da611863190c8
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the PDF structure and embedded URI are sufficient indicators of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=spanish%20texts%20for%20beginners%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401555/normal_5feff9ac74e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403940/normal_601b038b163b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407997/normal_5ff45ee3517a5.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/98844533238.pdfIn PDF document text
    • http://ita-bio.fun/pour_tout_complement_d_informationrglyo.pdfIn PDF document text
    • http://gisonanezoboru.iblogger.org/31684126152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447878/normal_601459cf59e6a.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/domegagowevag/teneligobosikigeripet.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/ruhs_bsc_nursing_syllabus_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/gejifu.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/335090389.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/gufofekofolizawokogi.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/addition_and_subtraction_facts_to_20.pdfIn PDF document text
    • http://rubaporejolo.rf.gd/82832016571.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/decamp_crossword_answer.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_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 5584 bytes
SHA-256: 7d8c85ad48609bf2415630004d6f74321636e5103b4788fc733f99c070b02154
font_01_sfnt_off00012de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE9 11520 bytes
SHA-256: 6e4f1a94970a77103d32517ba1e3cc15fe0ec0eca5d6f3af877ac3402d42dc0c

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