Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fec48137bfb86d3…

MALICIOUS

PDF

70.1 KB Created: 2021-03-14 17:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bf896fc07715b98f6b01e1852fd4df1 SHA-1: db81443c7a408fd582d4900e58db30c30179e7fc SHA-256: 8fec48137bfb86d3bb5f2f8bf7f92b58b8c7f74116cc022b14698d09c2f99135
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, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

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://xezojetit.ru/wix?keyword=zoom+cable+modem+5352+manual
    • https://cdn-cms.f-static.net/uploads/4421778/normal_604a3475d8376.pdf
    • https://cdn-cms.f-static.net/uploads/4465131/normal_6040f81cdd13b.pdf
    • https://cdn-cms.f-static.net/uploads/4387924/normal_6024f148845a8.pdf
    • https://static.s123-cdn-static.com/uploads/4401723/normal_5fc592dd1e54b.pdf
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5ffd48d1e2697.pdf
    • https://cdn-cms.f-static.net/uploads/4369764/normal_602f118b54452.pdf
    • https://cdn-cms.f-static.net/uploads/4454966/normal_6020d3a6ae9c0.pdf
    • http://ctuxuu.com/24123443228urf26.pdf
    • http://crysety.xyz/listen_to_marine_radio_channels_onlinecli64.pdf
    • https://cdn-cms.f-static.net/uploads/4446759/normal_602567c0c91f2.pdf
    • https://cdn-cms.f-static.net/uploads/4495391/normal_603e1a969adbc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mutidulofof.epizy.com/convert_to_word_free_download_nitro.pdf
    • http://bupazomop.rf.gd/african_medicinal_plants.pdf
    • http://pukevekoba.rf.gd/17829450279.pdf
    • https://uploads.strikinglycdn.com/files/7cc1294f-5787-4d9e-9327-0843b367faac/baby_bjorn_bouncer_mesh_cover_only.pdf
    • https://uploads.strikinglycdn.com/files/c8d84ba6-9d73-45b7-9d80-bf6bcdcecdad/6314942782.pdf
    • http://xuzatazuji.epizy.com/madufemilotawizekir.pdf
    • https://uploads.strikinglycdn.com/files/5335060c-0d81-4c65-9ee8-1b57579fef26/continuum_mechanics_and_thermodynamics_quartile.pdf
    • https://uploads.strikinglycdn.com/files/66a9e5b0-7093-45b3-ae3c-c6d08f624248/assignment_03_en130_english_composition_ii.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c988.bin
087cf55366f1f386bc673d9d5fe8cd37178d35f0ffcadb4ca5a023529522bc4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 5084 bytes
font_01_sfnt_off0000dab4.bin
a42c728196ce4fb7caaf3e9aa0dade0d0c61c9815af2ead7a8ee24f0b91fbb7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB4 10124 bytes
font_02_sfnt_off0000fd35.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD35 4324 bytes

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