Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8f0f4aa280c514…

MALICIOUS

PDF

68.9 KB Created: 2021-04-05 05:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88762e67a7bf00a6ffef98e70e930ff0 SHA-1: e23fe72db424a7835dc1c9dcf69b2efd6baad3e8 SHA-256: ef8f0f4aa280c514fb4a706a3ea3286a385ecc2968a107f2f758b9d8201c6795
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or credential harvesting attempt.

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://seumenha.ru/wix?keyword=a+las+barricadas+youtube
    • https://cdn-cms.f-static.net/uploads/4365575/normal_60673d5cf3552.pdf
    • http://suzamajotibe.mywebcommunity.org/kanesudusiwarejimefe.pdf
    • http://keksik24.ru/83586730053129rt.pdf
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fe5b50640335.pdf
    • https://static.s123-cdn-static.com/uploads/4447888/normal_5ffb8c9ceb7b2.pdf
    • https://static.s123-cdn-static.com/uploads/4389599/normal_5feefac197938.pdf
    • http://tefiwofo.22web.org/buku_standar_akreditasi_rumah_sakit_versi_2020.pdf
    • http://gadevafeto.iblogger.org/palmistry_reading_tamil.pdf
    • http://form-lnstagramverifiedbadges.com/ember_in_the_ashes_book_4_releaseh6fdq.pdf
    • http://boevoenlp.com/mhw_sturdy_bonehmpb4.pdf
    • http://casser.xyz/72149654475jlvhq.pdf
    • http://jozipuvuwuzaj.mywebcommunity.org/christian_names_and_their_meanings.pdf
    • https://static.s123-cdn-static.com/uploads/4474231/normal_6008e574c314e.pdf
    • http://fuxanujibiz.mygamesonline.org/tozorenozegawubuputedabi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kepagewav.atwebpages.com/how_to_pair_jlab_neon_headphones.pdf
    • http://zatuvejamubolo.atwebpages.com/uji_formalin_dan_boraks.pdf
    • http://kitawijarital.epizy.com/fefizedasawarojozib.pdf
    • http://zonudafin.epizy.com/hand_foot_mouth_disease_malaysia_2020.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_off0000d22e.bin
072b088c475ef2d0e89b0118bcbd15fb60f83cade08e9d5bf7ae3bd486d14bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD22E 5164 bytes
font_01_sfnt_off0000e3cc.bin
b17d5fe16b8b2182fdb67ec42d63c510750dd627493a6ce5c80c7a0cf3920d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 10360 bytes

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