Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdc106a43cd3dfd…

MALICIOUS

PDF

78.5 KB Created: 2021-03-07 20:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 999498c4fb446d39ff1421a5da965d1c SHA-1: 7f5ab4f2cd22c97d7e7b6f4ce55a568e2f274b83 SHA-256: 7cdc106a43cd3dfd8b0bf853eefa7f2fe4fa477f056899066c398982e6aeac34
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit the user's trust.

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://midufefew.ru/wix?keyword=the+philosophical+breakfast+club+summary
    • https://cdn.sqhk.co/woxemumi/jdhagcK/vewujowajezu.pdf
    • https://cdn.sqhk.co/vamosopon/evjfvih/86095685511.pdf
    • https://fezimadi.weebly.com/uploads/1/3/4/4/134487715/wewiro.pdf
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/9078165.pdf
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/mexonulepokupu.pdf
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/82fa7fc657.pdf
    • http://vogudikomi.getenjoyment.net/machine_elements_in_mechanical_design_4th_edition_solution_manual.pdf
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/fezix_fajoguwup.pdf
    • http://timinome.getenjoyment.net/roxewozekagivilad.pdf
    • https://pejoguroboxifuj.weebly.com/uploads/1/3/1/6/131637830/1692a6b.pdf
    • http://puzexijabin.mypressonline.com/lego_glock_18c_instructions.pdf
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/694543.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tobovunoberiki/99479227438.pdf
    • https://uploads.strikinglycdn.com/files/8c45f0ea-967c-4ab1-bd9a-12b04b4a91da/design_of_reinforced_concrete_10th_edition_solutions.pdf
    • https://s3.amazonaws.com/panokojol/nowepebemeruzo.pdf
    • https://uploads.strikinglycdn.com/files/aeb98f19-b2b9-4434-bab8-e5727ae0ced5/temakuzuzuzizowonose.pdf
    • http://dozopedatofol.atwebpages.com/dixagozojen.pdf
    • https://s3.amazonaws.com/xulikamul/xunawasujofirelomeluzo.pdf
    • http://zesafemumibow.myartsonline.com/is_dominos_garlic_dip_ranch.pdf
    • https://uploads.strikinglycdn.com/files/190b4dd5-428b-4507-b2fc-8aef2ad4d0d0/pepemabevidu.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_off0000f639.bin
2ed3be7a86af1f612bb5aebdda2264fbb91971c89478cb43aa6112a62c1a609e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 5512 bytes
font_01_sfnt_off000108d4.bin
131fb2a05968fbda0529be79ae81f6785991d2c2338850b382a4fd0935712316
pdf-font-stream PDF embedded font (sfnt) at offset 0x108D4 10424 bytes