Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efd67f986ca87c1…

MALICIOUS

PDF

66.6 KB Created: 2021-06-03 13:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0cd6f9057cac322044d76dead341f687 SHA-1: 503feaab00dd4cf416ddef4e291bd1952e5e910f SHA-256: 3efd67f986ca87c17dda7bd41ba5fec12825bb7440bb1325fa7836fc3517fa67
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 phishing or trojan payload. It contains an embedded URI pointing to 'oniceh.ru', which is likely the distribution point for the malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query for a specific PDF, suggesting 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://oniceh.ru/pbw?utm_term=myles+munroe+power+of+prayer+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467576/normal_600704324774e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_6029addb40e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5fd6584fe3cef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374704/normal_5ffecfd8adb9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417645/normal_600395851ad70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_6029a0564682e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_6050bcd8af463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461767/normal_5fec95155f38e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453888/normal_5ff831b493191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_60b83a241a841.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisagexal.pbworks.com/f/download_goons_io_mod_apk_android_1.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/55697755721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cffb37ba-a05a-43ff-aa14-01bcd889d954/how_to_sync_airtel_remote_with_sony_bravia.pdfIn PDF document text
    • http://kivotin.pbworks.com/f/78179377909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dba2dc2-47e1-48e6-abfb-b54b6e63527b/dd_5e_character_sheet_guide.pdfIn PDF document text
    • http://zipiwume.pbworks.com/f/zisejujezudorewifoxoluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90637eb-6797-41fd-bcc2-3e27c00b55f8/what_killed_chris_mccandless.pdfIn PDF document text
    • http://kivotin.pbworks.com/w/file/fetch/144550983/25979040287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1668c63-f07f-4dca-8df1-4be405a5a305/how_long_does_loose_tea_stay_good.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_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 5388 bytes
SHA-256: 9efc04750c2823e63a4a7e346ee2554cf82175fd877a21640bc30938ddf5579b
font_01_sfnt_off0000da8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8B 10208 bytes
SHA-256: 644ee914733fd267b7ce4470acb96266dcce69413069064f8af92f11eeb19ef3

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