Malicious PDF — malware analysis report

Static analysis result for SHA-256 313011d42b4d44fc…

MALICIOUS

PDF

69.1 KB Created: 2020-12-06 02:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 81913523ac3ff79bad77235dcb9b4cb2 SHA-1: d1e6662a5bfe09ebd927e372809ca28c3df8602f SHA-256: 313011d42b4d44fc94b6a4d79e3eb33fccfafd8bd7bed2b1c546ce7881aab14e
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/123?utm_term=warrior+cats+bluestar+and+fireheart+fanfiction PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453328/normal_5fa4d8e320efe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5fa51c98836a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5fabce182c70e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4ff8a7d0c8f249d5b3222/t/5fcc252d9aa2de0c648358d7/1607214382539/sharpener_pencil_electric.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc777e0778af068263eac13/t/5fcae861b495bd202816fdc6/1607133287852/29713660215.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59e4d104edf1d77a14846/t/5fc74672efc65c5b7a401079/1606895221804/povuxevawelowopogano.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112a36609fd0ee7924cd4/t/5fc761897995075abde35861/1606902155391/22222714413.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bcfb2e537a05ef083615/t/5fc0fb853f75b16643f711b7/1606482821648/jobusonosamodeguxij.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2856f24b06a7eb3098ecb/t/5fc55506f81c9a2a0c544fbc/1606767879158/womopugagawavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfdbb84e-324e-4383-a9e7-99545201a720/peguvete.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf05900f7af3919d23d7b/1606217818635/wexogowewixizovagobi.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/agri_application_form_2018.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_off0000d13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13C 5260 bytes
SHA-256: 9f5908c7a2b2b2cbdc19a1fb195f6f9fb132a0fac642eae01af57c52cf16365a
font_01_sfnt_off0000e322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 10836 bytes
SHA-256: c337496038323110ba0cb01a6668f0a528147df7dc768427f4e03ae8c989da7f