Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7b7b976a8b763a…

MALICIOUS

PDF

73.0 KB Created: 2021-02-24 07:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 5f3d53533ce24dc10cca22f3e3fb6470 SHA-1: c905b17b3fdcb3e6292b66bd66b76c831e5e35b5 SHA-256: 5a7b7b976a8b763a7d991e2e540257adcb4b654f385192a076b5b691a9919bd9
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 'bologen.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely leveraging social engineering to trick users into visiting the provided link.

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://bologen.ru/wix?keyword=whs+lions+library PDF link annotation
    • http://autoport76.online/diccionario_biblico_cristianort1hv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393904/normal_6000b1abbe909.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_60036887c1fcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391915/normal_5fe251d4d2143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5fd105f5ddaf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5ff53a4bc6a31.pdfIn PDF document text
    • http://vezdesami.ru/74463892216ty0ay.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/discrete_mathematics_and_its_applications_5th_editionuagvs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fc5d13519a34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_60274528680bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_600c68923e84c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500904/normal_5ff8dac987e2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413474/normal_5fddfbfb2a2ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5ff0cfd07d70c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_602456b182773.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445888/normal_5fe02f19f156c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_5fd257dcaeac3.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/dadupawo/84523237942.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_off0000e1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A8 5028 bytes
SHA-256: b8dc905a9b254884278bf3a515637ec366c2080807c75846182cdbea059416ac
font_01_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 10752 bytes
SHA-256: 936cce1a6ef2cb02bb33354fda2ffce495ab3194969626bed018ca850d761a75

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