Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e8c9d6fd734400…

MALICIOUS

PDF

73.5 KB Created: 2021-03-01 21:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2a0e393042e4b2c01f7e2daf7648535e SHA-1: 78263459079226f5869535af6b00a93549392bf7 SHA-256: 03e8c9d6fd734400ecbd54d9177df4d53bc73dc08906a353958df2e18b127f58
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru' which appears to be part of a phishing lure, using a search query as bait. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://maypoin.ru/wix?keyword=san+jacinto+cemetery+houston+tx PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445337/normal_602b11cc517c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471091/normal_5fcf4193d9d48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fd074d92091c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_6030fcbb1ca07.pdfIn PDF document text
    • http://rebelojujiraw.iblogger.org/numerumifezozafisotepuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475852/normal_5ff16a0a06a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_603c1fe0ec064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fe488fd4f2e4.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/dojivewobasuval/barack_obama_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/95355377011.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/android_studio_button_onclick_change_text.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/gefola.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/low_blood_sugar_guidelines.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_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 5356 bytes
SHA-256: ae7de6b4ba99b432abe32aa59508ae72b0c9c20f7688938b024e967024af3148
font_01_sfnt_off0000f5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C1 10460 bytes
SHA-256: 8a0adad20e03e964f49b09a01dccdf1f13d726a25e839bb3d0c59cb19e9f457f

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