Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e6f6da603c87ea…

MALICIOUS

PDF

75.2 KB Created: 2021-02-22 02:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bb6f72a83b1a5e068f0de6a0bfd47b98 SHA-1: 33e584554d48610a521c9f6931a2b14cd31fdb10 SHA-256: 54e6f6da603c87ea055f1bf35ac13d4751c116d9de8879d7060a23f937634c02
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 embedded URI pointing to 'jacksth.ru', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'abnormal psychology online course free', suggesting a lure to entice users to click the 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://jacksth.ru/123?utm_term=abnormal+psychology+online+course+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384482/normal_5ff38b0a6fa5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_6019e1ec1425e.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/3ihidWT/immigration_and_nationality_act_of_1965_misdemeanor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_601ee8de8a5b2.pdfIn PDF document text
    • http://pidawiwosoda.iblogger.org/46654600977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450354/normal_6032e3251b0f0.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/fghMNha/photo_tool_for_dv_lottery_2019_green_card.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369311/normal_5fe5627175019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372702/normal_5ffbefb9ebd29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443809/normal_5fe008821d0a4.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/8hdjcji/american_jail_break_block_strike_survival_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vawupemowa/fiahiha/lurumepura.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tolitaxolumupu.rf.gd/44002227029.pdfIn PDF document text
    • http://sogigadataga.epizy.com/meilleur_antivirus_gratuit_pour_android_samsung.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE810 5660 bytes
SHA-256: 97d61a04f3972c96faaf8e432c65dd316986c8a1aeae01b894acf21c9f2d62a4
font_01_sfnt_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 10892 bytes
SHA-256: 62a6ef590699afe963cd78d9ddd6ca76daa4395ad56764638f97aa6f3c6ddfae