Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b0f3e2df0873a2…

MALICIOUS

PDF

80.4 KB Created: 2021-03-15 17:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a48dff5eea48a83f72b7ae27ccea39 SHA-1: 1aca26ea1be1a560198f52544b58d0f6c308d5eb SHA-256: f3b0f3e2df0873a2427f7026f1d6cfd2156124c6d07852c92e60b127a364d863
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, appears to be a lure related to a baby monitor, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=how+to+pair+summer+panorama+baby+monitor
    • https://cdn-cms.f-static.net/uploads/4464852/normal_604b5120e6f82.pdf
    • https://cdn.sqhk.co/rovovuroj/cVjbhcE/notuwakabofowolanubemo.pdf
    • https://cdn.sqhk.co/lilakeboj/eqRje1u/gakopub.pdf
    • https://static.s123-cdn-static.com/uploads/4391602/normal_5ff9da720ad77.pdf
    • https://cdn.sqhk.co/xafiguzi/2jdig8j/20964921047.pdf
    • https://cdn.sqhk.co/rarinuva/bahhmih/32113641950.pdf
    • https://cdn.sqhk.co/gukugifixija/FYmCmhd/study_skills_strategies_for_elementary_students.pdf
    • https://cdn-cms.f-static.net/uploads/4404730/normal_600a6659e527b.pdf
    • https://cdn-cms.f-static.net/uploads/4380211/normal_601bd450820b1.pdf
    • https://cdn-cms.f-static.net/uploads/4418556/normal_601001cb73ea5.pdf
    • https://cdn.sqhk.co/jenetuwuda/fEshgif/lemon_pudding_pound_cake_recipe_from_scratch.pdf
    • http://lasns.fun/why_does_my_smoke_alarm_flash_redqvt9z.pdf
    • https://cdn.sqhk.co/todusukiraxi/aGggjja/433408016.pdf
    • http://rewuvov.iblogger.org/farm_animals_worksheet_esl.pdf
    • http://mini-cam-v2.club/bitter_gourd_imagesxtk6i.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/varolexexus/86912503370.pdf
    • https://s3.amazonaws.com/gebukil/10146777028.pdf
    • https://s3.amazonaws.com/fatikonavori/administrao_de_medicamentos_via_subcutnea.pdf
    • http://nujufotesu.epizy.com/unitedhealthcare_dental_provider_credentialing.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_off0000fd57.bin
20056ce4bf91842c5e6aeea1b4361859868948367f5d6f332bfdc764525d5e75
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD57 5228 bytes
font_01_sfnt_off00010f14.bin
abd2a9a4eb45be51f2dc347e89d60879052feddabb328fe3290e9e2711711afd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F14 10856 bytes