Malicious PDF — malware analysis report

Static analysis result for SHA-256 908860f6daf7b795…

MALICIOUS

PDF

69.1 KB Created: 2021-01-18 21:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2889692653c1fd69e7d7b8c12594f6f9 SHA-1: 34b1444de6eb606b7095faffb34fa70de10c3db0 SHA-256: 908860f6daf7b795450d43ef412304b6652225bbebcbca9a9c5d4f8dbdce3247
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=fashion%20doll%20girl%20makeover%20download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417675/normal_5ffb600dc6925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5fbf3e6081a67.pdfIn PDF document text
    • https://cdn.sqhk.co/rufigukuj/Hjhhg9S/barrett-_jackson_scottsdale_2020_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/jajiAji/39693613954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_5fd727604397c.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/1jcifoA/tofegagipowebaxirugija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_5f9af62174afd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447626/normal_5ff66e1dabd04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456134/normal_5ffe9baa3627e.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/je0c7Fe/cbse_class_8_science_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fobunedofakane.rf.gd/67493935536.pdfIn PDF document text
    • http://joriboka.epizy.com/75335575738.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/bubble_shooter_games_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/cutting_edge_thinking_and_practice.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_off0000cee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE4 5408 bytes
SHA-256: 36aa52b01a8ab6a4ab47343ac2668bc125aee82706cc0001d527f6bf040f5dff
font_01_sfnt_off0000e134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 11308 bytes
SHA-256: 8713b24066ffcd09d4d5ff1978d6280f516a17f157a60d8c8fca7359067374d8