Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5c0a68463e1744…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 14:16:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20c48b18ebec567e88414947800bdbc SHA-1: 911d44661fa0fbb87554e91f31d8617a2741c610 SHA-256: bd5c0a68463e17446d787b751e775361ebd34d0b0fbe0f75e1e494bb628b69d2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host phishing content or a secondary payload. The document body, though heavily obfuscated, suggests an attempt to disguise the malicious nature with educational material.

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://gimoguvi.ru/strik?utm_term=past+perfect+and+past+perfect+continuous+perfect+english+grammar
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fdfb094d5e46.pdf
    • http://saganofodevuset.22web.org/autocad_2007_windows_10_free.pdf
    • http://lipuwisapi.mywebcommunity.org/60393918192.pdf
    • https://static.s123-cdn-static.com/uploads/4466140/normal_5ffeb536d8705.pdf
    • http://gobuweba.22web.org/esp32_datasheet_en_espressif.pdf
    • http://zabovawupe.mypressonline.com/6418159756.pdf
    • https://cdn-cms.f-static.net/uploads/4388165/normal_6047ddae352cc.pdf
    • http://kagiburof.iblogger.org/bazel_external_android.pdf
    • https://cdn-cms.f-static.net/uploads/4457847/normal_603c55d6eb9bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sitozi/vimibigodeliruvubipipigo.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/49623297119.pdf
    • https://s3.amazonaws.com/zemunomipazikez/80437372970.pdf
    • https://s3.amazonaws.com/wexukufedepim/gran_tierra_energy_earnings_report.pdf
    • https://s3.amazonaws.com/dowesitobuga/letter_h_worksheet_preschool.pdf
    • http://kotasogova.rf.gd/occupational_health_and_safety_policy_template_ontario.pdf
    • http://puwovejivu.rf.gd/netbeans_java_tutorial.pdf
    • https://s3.amazonaws.com/safago/xadix.pdf
    • https://s3.amazonaws.com/vuzotisenixava/bevetani.pdf
    • https://s3.amazonaws.com/wekibik/in_praise_of_shadows_book.pdf
    • https://s3.amazonaws.com/degagaziv/angular_material_select_form_control.pdf
    • https://s3.amazonaws.com/fumiposamisur/vepekinadeno.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e661.bin
f8fd452eee815407a8775d8725ff72d8e4bb110ea3c421705f969874bad56fc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE661 5568 bytes
font_01_sfnt_off0000f929.bin
371329909f3ae44f984c9fe20ef3ca301849278668c45072e7ce8f4daf88ede6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 10932 bytes

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