Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2742148c45d437…

MALICIOUS

PDF

67.2 KB Created: 2020-12-18 15:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3d0c30081ec8ccad3fb41b7be3e49c65 SHA-1: b3a84a3ebe33e9218790c94b4429e5cd9cd38dad SHA-256: eb2742148c45d437ee24dd57d3e0916efda6bbd695571bd3099f2888d97df0a0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, which is likely used for phishing or to serve a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'summary pdf'. No scripts were extracted from this sample.

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://trafffi.ru/strik?utm_term=harvest+manjula+padmanabhan+summary+pdf PDF link annotation
    • https://reganumezeku.weebly.com/uploads/1/3/4/7/134749319/3288868.pdfIn PDF document text
    • https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/liwuwije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443574/normal_5fa5a2c5a9a65.pdfIn PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/cd7647a057667e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f877d30bc06c.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/baxekojojexusol/pioneer_clothing_ideas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbcbbf71053ccb0ffb78/t/5fc3c2a7145a8629dc235332/1606664877638/2_peter_3_16-18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223223f3-93ea-4ec7-b8c9-86318dc9109a/tejido_conjuntivo_laxo_caracteristicas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdeb5349d01c20c203260c/t/5fcf8f101901dd4d2ed94dee/1607438096661/puppy_has_runny_poop_with_mucus.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/london_accountant_salary_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/326bf089-786a-4ea0-8844-5c7909a30c0c/monuwobemutimipevob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc788c9791da6493f6aea64/t/5fd71552ab77727176a74aa6/1607931218384/25._1_the_electromagnetic_spectrum_worksheet_answers.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_off0000ca4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4B 5620 bytes
SHA-256: 6516efd08410101833c6a14e6d29a2187b7e0dd30ec2bb8a982442e818ce6681
font_01_sfnt_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 10192 bytes
SHA-256: c4876d5baaeacd20ef5fd28c26f25c5944bcf61d44f6f75e9c5af0c1db9ff934