Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6252e5bacb857d7…

MALICIOUS

PDF

74.5 KB Created: 2021-03-14 20:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d8812fbe6a83c0e8e510970eb985c7f SHA-1: 50f40ebb9bab41b0871c8061abcce4fc518aa0b1 SHA-256: e6252e5bacb857d76de2e29a15fce3199c7c087446b2cc20c8490ab181d09be7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to deliver a second-stage payload.

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://golowaki.ru/award?keyword=arab+league+history+pdf
    • http://fitness1.space/emachines_e525_graphics_driverx20ie.pdf
    • https://cdn.sqhk.co/merojuniv/BShcggh/pararaf.pdf
    • http://com-servers.online/permanent_magnet_synchronous_and_brushless_dc_motor_drives_downloadzovte.pdf
    • https://cdn.sqhk.co/wudawagirus/LjjhhpJ/toss_em_all_mod_apk.pdf
    • http://mapotilij.mygamesonline.org/the_trials_of_apollo_1_download.pdf
    • https://cdn.sqhk.co/fuvebopeweb/jdlcihX/12079853881.pdf
    • http://zabovawupe.mypressonline.com/wagoje.pdf
    • https://cdn.sqhk.co/zisubiziwu/cXiAWhi/suguweposowan.pdf
    • https://cdn.sqhk.co/suxepemup/a0jbWii/mebilerexurodolalesibi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dobikasukavu/how_long_to_heal_after_dental_trauma.pdf
    • https://s3.amazonaws.com/tidigudetefumof/letter_tracing_worksheets_free.pdf
    • https://s3.amazonaws.com/zifilobesumafi/96220180934.pdf
    • http://titugol.atwebpages.com/ruger_p95_9mm_review.pdf
    • http://bonoburadik.epizy.com/24276250890.pdf
    • http://tulifal.onlinewebshop.net/bosarivevarusikoxuganor.pdf
    • https://s3.amazonaws.com/jazofi/wanuvutuke.pdf
    • http://gokamevagared.epizy.com/cadiz_ky_weather_report.pdf
    • http://wisigisovet.rf.gd/69464629435.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_off0000e5ee.bin
458c27b16fe5ead680acbaf06ede0c21d49fbb9755304b78b9dafedada206241		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 5532 bytes
font_01_sfnt_off0000f8b9.bin
b2b4cd5996b43632292e07851cd3e9b77557e0451d7e3e68cc490e095f8b371e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 10888 bytes

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