Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde530446f87496a…

MALICIOUS

PDF

75.1 KB Created: 2021-03-10 01:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c27d21f2a39a5cc9e8b1b6609e532719 SHA-1: 2da764f2426b07afa2cba5bca761cf41b92f0d6c SHA-256: dde530446f87496a5ed63e37bc0c726859328d00685d1c29f108d55d3dca7264
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms it is malicious, likely a phishing or trojan delivery mechanism. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'syntax tree diagram for questions', which is likely a pretext to drive the user to the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/aws?utm_term=syntax+tree+diagram+for+questions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ffa9c58e2c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499984/normal_602b91be4dfe9.pdfIn PDF document text
    • http://onlyforyou.space/lagogekaxeleroniriwurijr48q.pdfIn PDF document text
    • https://zuwogirunuwexi.weebly.com/uploads/1/3/5/3/135331524/32c290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5fd8690bc819b.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/tiruxu-vurakazobesuvo-datawogamedunos-lotuzerades.pdfIn PDF document text
    • http://naturagrush.space/7_strategies_for_wealth_and_happinesfvlrw.pdfIn PDF document text
    • https://pufujodixig.weebly.com/uploads/1/3/1/4/131438007/mivogivoboge-laramazu-meradu.pdfIn PDF document text
    • http://funseeds.site/mike_in_brazil_popirad474l.pdfIn PDF document text
    • https://xulasimij.weebly.com/uploads/1/3/2/8/132814518/1948347.pdfIn PDF document text
    • https://zolerowiz.weebly.com/uploads/1/3/4/6/134691656/8104771.pdfIn PDF document text
    • https://walikuroxora.weebly.com/uploads/1/3/2/8/132815001/585755.pdfIn PDF document text
    • https://fodolirikixubug.weebly.com/uploads/1/3/5/2/135297927/fiworuwaxak.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/xoferuzu/bermuda_ferry_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68156aed-6157-4f11-ae9a-c7c346ebf14a/proof_of_eulers_formula_using_taylor_series.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/automobile_engineering_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/alv_drill_down_report_in_sap_abap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef0ba1c-9369-438e-8fae-2989efdaf9b5/38221256015.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/didekaxoguli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcf1546-d04e-478b-a1a2-0b7c2bc3aba1/who_invented_by_telephone.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_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 5596 bytes
SHA-256: 290cfb9b508cc3c7e136ab5e6c4aa5bbb8b9024c45635beb0849afd57c30fff3
font_01_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 10232 bytes
SHA-256: 1452b0bf9b9257f54f3cfc0cde0d4d5b86d1258c90db4e8787755161e5696aca

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