Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f835f1e8ba62866…

MALICIOUS

PDF

123.7 KB Created: 2021-02-19 12:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4700979e42e8f07a34ae86da9ba33e30 SHA-1: 78657a5957ba6dfffa52e0ae86996051b6ac5142 SHA-256: 0f835f1e8ba628668b7d9fc280a68efc7d032c8bb5a32bd81437d1fc83b5ab59
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious external resource.

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://seumenha.ru/strik?utm_term=unequal+childhoods+summary+chapter+1
    • https://cdn-cms.f-static.net/uploads/4447646/normal_60118c82e00ee.pdf
    • http://gezesapifo.22web.org/nuzotarugeruniguxida.pdf
    • http://italdom.fun/62153578419fachv.pdf
    • https://wowemaba.weebly.com/uploads/1/3/1/3/131380083/2931063.pdf
    • http://nigma24invest.online/90044793671q2zwd.pdf
    • https://cdn-cms.f-static.net/uploads/4412183/normal_600ced792e927.pdf
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/9322513.pdf
    • http://top-agent.ru/vapesurnkd6.pdf
    • http://roflan.site/lurizakomisozurebozivafubimlfy.pdf
    • https://cdn-cms.f-static.net/uploads/4461744/normal_60109c99969be.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zikukoji.epizy.com/wusipilofovu.pdf
    • http://dejedizanabi.epizy.com/arduino_free_mac.pdf
    • http://xarozitapakegur.epizy.com/firex_smoke_alarm_user_s_guide_i4618.pdf
    • https://s3.amazonaws.com/jejulurowev/xepafosiju.pdf
    • http://banitazivi.epizy.com/fedex_drop_off_ues_nyc.pdf
    • http://natexekazedap.epizy.com/55016968167.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_off0001a517.bin
d2a617ae0a7d5970ddbf976222d7634b55f60f6310898728329f731622e11a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A517 5584 bytes
font_01_sfnt_off0001b7f0.bin
3990be9c1b98560f2bd1c91e83f3ba3127ce017e426e5d7233551d6a448a22f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7F0 13376 bytes

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