Malicious PDF — malware analysis report

Static analysis result for SHA-256 c814869c58f91262…

MALICIOUS

PDF

79.6 KB Created: 2021-03-23 13:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b55accffeb5ca6a97b34dc56176ed8fc SHA-1: 764b3d183712e0167e85925781a66ef46ae31a90 SHA-256: c814869c58f912623e02f3466d1907af328dae43b6000c229fdcc708e4fedd92
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://jacksth.ru/award?keyword=castilian+language+pdf', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URL and the malware verdict strongly suggest malicious intent.

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://jacksth.ru/award?keyword=castilian+language+pdf
    • https://static.s123-cdn-static.com/uploads/4407777/normal_6004710f009d0.pdf
    • http://mekozeka.66ghz.com/ninja_hattori_dj_song_pagalworld.pdf
    • http://trysoda.club/removing_anode_rod_for_suburban_water_heaterlcaig.pdf
    • https://cdn-cms.f-static.net/uploads/4456999/normal_6059771835491.pdf
    • http://mixit.info/738497444030o5ao.pdf
    • https://cdn-cms.f-static.net/uploads/4449004/normal_604ae84814c28.pdf
    • http://furogoverakafex.22web.org/2572811277.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kelageketisefuv/best_blues_songs_of_all_time.pdf
    • https://uploads.strikinglycdn.com/files/92640e63-4edc-405b-b4a7-70e72681eda4/wahl_dog_clippers_instruction_manual.pdf
    • http://regujivabi.rf.gd/59775691581.pdf
    • https://uploads.strikinglycdn.com/files/7ebd9897-d49a-44bb-87fd-ed8a8cc7a60a/world_war_zero_ironstorm_para_ps2.pdf
    • http://mokunir.rf.gd/how_to_teach_sense_of_sight_to_preschoolers.pdf
    • http://sokagozu.rf.gd/34466499634.pdf
    • https://s3.amazonaws.com/taguxif/34757795477.pdf
    • https://s3.amazonaws.com/nelizenejakarug/tovedotubipetaxe.pdf
    • https://uploads.strikinglycdn.com/files/ad3e920e-8ede-4054-8de5-47e67294cc8b/kafodabuxufufomi.pdf
    • https://s3.amazonaws.com/ximupuv/emerald_tablets_of_thoth_book.pdf
    • http://dovesibikore.epizy.com/36639909642.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_off0000eb3a.bin
8c84e2807034a13cfa1a030f0b3ec6d0aa5f846842a214dc264ecf624428477d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3A 4908 bytes
font_01_sfnt_off0000fbfc.bin
c4623bd5525ddb59e1587487a75f3554c5d4f1d06410f45dbd2241782a45313e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 11768 bytes
font_02_sfnt_off000122f8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x122F8 4324 bytes