Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa09fc89ae592a9…

MALICIOUS

PDF

72.2 KB Created: 2021-02-10 03:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 93dc4024b88386398fe4666d59c2fb0c SHA-1: 4f8a2ad666625c834ffc2a420be5b1cb5b15396b SHA-256: 8aa09fc89ae592a91c9c2bdbcf0a49b59735dd8d8fab737d1057dcf528ff993f
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'jacksth.ru' and heuristic firings related to PDF external URIs and urgency lures suggest a phishing or malware distribution attempt. Although no scripts were extracted, the PDF structure and embedded URL are strong indicators of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=black+mystery+snail+anatomy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467561/normal_601a4320bb475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458824/normal_5fc8dfeebba61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_600a121c24b9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5ffa1f8986645.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/hgdhbNZ/dr_lowe_stockbridge_ga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421335/normal_5ffbc4508e0bc.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/lhjwOij/foosball_world_cup_18.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/1iiaOjf/world_war_2_tank_battle_kursk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368218/normal_5ff50b1142210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503533/normal_6018e7fb60cd8.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/jjSLphd/65418191870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_600bd3bf430ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489422/normal_5fcd352e24ecc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bugutaj/ragnarok_m_eternal_love_archer_stat_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/zimosi.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/carboxymethylcellulose_sodium_davis.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_off0000dce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 5160 bytes
SHA-256: 37f7807e329e3474be06871b330e9c28eac2413db645a06edf9a23d764e32a1b
font_01_sfnt_off0000ee66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 10924 bytes
SHA-256: 6ceba0c3bb99df331a0ac43f42da91592154fccab0c163f8eba1fd33ee7a9a5d

Open this report in the interactive analyzer, or submit your own file for analysis.