Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fc729a5a43afdd…

MALICIOUS

PDF

71.2 KB Created: 2021-01-31 23:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e32ea6e87a265cd6d3ad972edc32e1fc SHA-1: 90efe7104fb0b065b4e4cfa59674c18cbca90bea SHA-256: d9fc729a5a43afdd383f0b41f78a8e2a478c1f86f389823a1c4553d2c7a78996
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 presence of an external URI pointing to 'seumenha.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a malicious document, likely used as a spearphishing attachment to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=nc+teaching+standards+2018 PDF link annotation
    • http://lg-copyright.com/noodelcade_minecraft_unblockedkoge7.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/jufuj.pdfIn PDF document text
    • http://goodshopsales.xyz/that_s_you_ps4_trophy_guidezx9r4.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/ranifuwebymkdi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5fed61db02414.pdfIn PDF document text
    • https://verevivomilob.weebly.com/uploads/1/3/0/7/130738769/383063.pdfIn PDF document text
    • http://erogan24.website/76136812690adw7p.pdfIn PDF document text
    • https://patinijogu.weebly.com/uploads/1/3/4/8/134854147/zulobagiji.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/vinuzurofeb-migazod-vufosuxixan-disawotijirikum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505358/normal_5fd86eae8ee0c.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/folexapurilowe/68590093929.pdfIn PDF document text
    • http://xituduriximujat.epizy.com/kukejojazexug.pdfIn PDF document text
    • http://xebowuruno.epizy.com/computer_parts_information_in_marathi_language.pdfIn PDF document text
    • http://rojapamun.epizy.com/80283914499.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/77427703876.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/58841739903.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/classification_of_living_things_chart_answer_key.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_off0000d7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D4 5656 bytes
SHA-256: 4ee9ead9475c3926e6a6a66850c40197c223c797cd277da35ef0b23f9bbb9f43
font_01_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 10824 bytes
SHA-256: 6863aa8b5bdc3760fa50f42913f677f8fbcdb2075ba4affe2c32ba47748b1770

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