Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f25e5b00ac38b40…

MALICIOUS

PDF

89.9 KB Created: 2021-02-15 18:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 71ebad692e4bd78112ca2ac48312004e SHA-1: dd86ee9e1a33aeca25f4c70b8bc7a27c97a9c74a SHA-256: 4f25e5b00ac38b40328ede8941eb0902c87b34aa915494d639b13417018ca823
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 identified as a phishing trojan. It contains an embedded URL that is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though truncated, suggests a lure related to 'getting paid reinforcement worksheet answers', indicating a social engineering tactic.

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://baarspo.ru/wix?keyword=getting+paid+reinforcement+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416144/normal_5fe4327763931.pdfIn PDF document text
    • http://scarcebook.com/42103466150bxrem.pdfIn PDF document text
    • http://vizionsmc.net/52193439562yexfw.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/hfKYchd/2048_pokemon_hacked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373986/normal_5fdf614e442e0.pdfIn PDF document text
    • http://naturwows.space/black_veil_brides_album_rarxoeq4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_5fc69ebe59216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_6027c1e771988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393204/normal_5fc988d06ecca.pdfIn PDF document text
    • http://nominasacra.ru/xbox_one_skyrim_load_orderpxera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fcd447c59007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_600de9aeb77a0.pdfIn PDF document text
    • http://ita-bio.space/contemporary_behavior_therapy_spiegleragljq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://virefixifefuke.epizy.com/lizilatamobatu.pdfIn PDF document text
    • http://gogolozumer.epizy.com/malayalam_christian_christmas_songs.pdfIn PDF document text
    • http://fepevakadiw.rf.gd/mulibiwozegidopominaz.pdfIn PDF document text
    • http://buwozefavimim.epizy.com/adobe_technical_suite_2017.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_off0001210e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 5724 bytes
SHA-256: 2dd3fa766e2ea279966c417873be65bacefdd59dc30ad57f8bcfbda491cf2669
font_01_sfnt_off0001347c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347C 11052 bytes
SHA-256: 6974bbc00d586250827591d02077e72b0597e02049c2bb6d3e6e91ab0fcb1cd5

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