Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc800216e65a71e…

MALICIOUS

PDF

66.7 KB Created: 2021-03-02 23:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a37216225da85e0c388fb6344d04fa07 SHA-1: 7373e31b1efce034d21db1abbb78cd2066973fcc SHA-256: 1bc800216e65a71e4646ce8874e668478ebaa3887c843007a88430560d724026
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains a title related to TV settings, suggesting a lure. The presence of multiple embedded and external URLs, including one flagged by heuristics, points towards redirection to malicious sites for phishing or malware delivery. No scripts were extracted, but the PDF structure and URL findings are sufficient to infer a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/strik?utm_term=how+to+change+vizio+tv+to+full+screen+without+remote
    • http://trycabinets.xyz/5508092051344bt.pdf
    • http://samyog.ru/jump_on_it_sir_mix_a_lotjo0ar.pdf
    • http://ekzo-fruit.ru/63964137955uo8lo.pdf
    • http://fifamarketbot.com/20052212509mtkzz.pdf
    • http://bio-ita.fun/what_foods_are_gluten_free_at_mcdonaldsgl252.pdf
    • https://static.s123-cdn-static.com/uploads/4470537/normal_6006c68ec723d.pdf
    • http://talakam.space/21669232693nj7wd.pdf
    • http://esclub.info/incident_report_for_tardiness83ich.pdf
    • http://wegafanu.iblogger.org/83612705262.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fipaduwa.epizy.com/nolokavinozupaxur.pdf
    • http://fedukiz.epizy.com/zagoridowajozegokeso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c80b.bin
1d3ba29163933f322d9c8247373bb8bf5f01e3f680d1d9c05efc5cbddb55837e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC80B 5460 bytes
font_01_sfnt_off0000da9e.bin
43b97dd075d737c2e22e03402e0e06442168bf07eb67fc57337078dad335557e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 10372 bytes

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