Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d34e4a68739ba6…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 08:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aec0b0d323bb5d6deabf5a47a007391 SHA-1: 5556ebcbcd7d8b26310971f4113e5593c276ea99 SHA-256: 53d34e4a68739ba630facda60ba252dc5b356b697f5855e764c689ccac036c53
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'doctrine and covenants seminary student manual' to entice users to click the embedded malicious link.

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://maypoin.ru/wix?keyword=doctrine+and+covenants+seminary+student+manual
    • https://cdn.sqhk.co/xovepejegosi/13Dghke/xevojinaxolaguxopamugevu.pdf
    • http://tvoeobrazovanie.fun/kabotumikokolerngnz8.pdf
    • http://hookup157.fun/xmeye_setup_for_pc_windows_xpbfuti.pdf
    • http://fruittea.space/xonajutewanowu2ms48.pdf
    • https://cdn.sqhk.co/zopimoforaja/dB5GiZ0/american_world_war_i_propaganda_posters.pdf
    • http://frasqen.online/3243159324068vph.pdf
    • http://ketotreno.buzz/701651382331rz99.pdf
    • http://circulshtangcalip.website/50472075304i6ah9.pdf
    • http://finansi-7.online/726328270881tne6.pdf
    • https://cdn.sqhk.co/wugeguxu/CicY9q4/who_took_the_boy_fairy_tale_adventure.pdf
    • http://paganel.world/45627722567bv0ks.pdf
    • https://cdn.sqhk.co/tasokuxu/0xpighd/bamezapufurasil.pdf
    • http://abanca-electronica.com/edible_gold_leaf_sheets_south_africayv9h5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://selamamoli.epizy.com/84352410163.pdf
    • https://s3.amazonaws.com/kizugokofo/subalusabidavejoxif.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_off0000d8f0.bin
2e82789e06751db40d84d9df1a2a92b883b56f37978c7173a549b02216b67424		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F0 5244 bytes
font_01_sfnt_off0000eac2.bin
9134b649fceb9722cb669222cb3ede84fdaf0f8fc7aaa65cfc544a898acaac42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 10092 bytes

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