Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b712062668b22c7…

MALICIOUS

PDF

79.2 KB Created: 2021-04-16 18:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21d2bc4bbbfaf7929d71aad9d2dff32f SHA-1: 9baea449e89da2def645f0bc7d1b47736c6f5fd1 SHA-256: 3b712062668b22c7280d79bae5bef4be8babf311e1b7259e5897c69c3c95d200
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 URL that directs users to a suspicious domain, likely for credential harvesting or malware distribution. No scripts were extracted, but the presence of the malicious URL and the strong detection signals indicate a phishing attempt.

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://botokaw.ru/strik?utm_term=on+my+honor+chapter+3+summary
    • https://cdn-cms.f-static.net/uploads/4450730/normal_603c70527f126.pdf
    • https://static.s123-cdn-static.com/uploads/4379241/normal_5ff4c730efe73.pdf
    • https://static.s123-cdn-static.com/uploads/4388835/normal_6007e3ac5e72b.pdf
    • https://cdn-cms.f-static.net/uploads/4446155/normal_6067f0091060a.pdf
    • http://mavaxur.mywebcommunity.org/behringer_xr18_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4451766/normal_6043160adc7e8.pdf
    • https://cdn-cms.f-static.net/uploads/4477651/normal_6059c1838e2d2.pdf
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5fc96d95bb50f.pdf
    • http://jesawukimefix.mypressonline.com/cheating_in_relationships.pdf
    • http://zagejudivavi.sportsontheweb.net/88533488241.pdf
    • http://jorowijedo.mywebcommunity.org/dewalt_dw402_parts_breakdown.pdf
    • http://sebevifa.getenjoyment.net/alice_in_wonderland_full_text.pdf
    • http://tanivikovome.sportsontheweb.net/99287886404.pdf
    • http://waferaboteb.mypressonline.com/anionic_surfactants_organic_chemistry.pdf
    • https://static.s123-cdn-static.com/uploads/4447467/normal_5ff13f8131d11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mokuwanibof/fekivupuxorutomolo.pdf
    • https://s3.amazonaws.com/fejakixoweka/38838435957.pdf
    • https://s3.amazonaws.com/polojuliragam/1175515109.pdf
    • https://s3.amazonaws.com/rodiligarexo/xazanejaxin.pdf
    • https://uploads.strikinglycdn.com/files/d13424dc-dfdb-4b2c-8f63-3dc1de43385f/21867510347.pdf
    • https://uploads.strikinglycdn.com/files/4a9a1fbc-4b8e-4e9f-9cf7-6c930254ac14/lobogokojesupu.pdf
    • http://vumamuv.myartsonline.com/zunubipu.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_off0000f783.bin
baec3a7f740a855bd2691e678f4e051fa74113d651f227c50723426dce4c5f50
pdf-font-stream PDF embedded font (sfnt) at offset 0xF783 5432 bytes
font_01_sfnt_off000109d3.bin
bff07ce58b771f9084624f17a5cc7fe20ddc7f247b7dc11192b7aaabfc21f95e
pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 11044 bytes