Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ca5a627fab8f6b…

MALICIOUS

PDF

114.7 KB Created: 2020-12-16 01:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db658fb7d200b61da791196e53d2837f SHA-1: d64b58d74b2602e559273113a4d08a0bd3143e30 SHA-256: 67ca5a627fab8f6b2554d738f93f4c92867a3ca907d56707fc83c385dccdf2cf
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to government forms, consistent with phishing tactics.

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://trafficel.ru/aws?utm_term=addis+ababa+city+government+revenue+authority+forms
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/taguxif/62376333084.pdf
    • https://uploads.strikinglycdn.com/files/cdfc850f-771d-422d-81d4-d8dedd581da5/terraforming_mars_card_template.pdf
    • https://s3.amazonaws.com/vuzufexarevima/searchs_php.pdf
    • https://uploads.strikinglycdn.com/files/138364bd-55ce-48f0-b75d-9a5b3e663916/bozomuwa.pdf
    • https://uploads.strikinglycdn.com/files/e8f1b64d-8c4a-4020-a871-2859a8ac9626/les_articles_partitifs_ejercicios_on.pdf
    • https://s3.amazonaws.com/welanisowari/independent_auditor_s_report_malaysia.pdf
    • https://static1.squarespace.com/static/5fced44694f25741fd49338b/t/5fd65ca05b1f6f7539d644e8/1607883936737/medical_certificate_for_sick_leave.pdf
    • https://uploads.strikinglycdn.com/files/3bb7bb81-106a-411a-980c-265113cac93e/25958428753.pdf
    • https://static1.squarespace.com/static/5fc4e657be9b693951246ba3/t/5fcd7ab9a87f9f1b19efc863/1607301817709/zombie_diary_2_hack_mod.pdf
    • https://uploads.strikinglycdn.com/files/f18c583a-0bba-4477-a6c4-1474c9db9b5c/leaf_structure_worksheet.pdf
    • https://s3.amazonaws.com/gixawetopoli/zuwobotitazilo.pdf
    • https://s3.amazonaws.com/sikuva/dynamics_nav_365.pdf
    • https://s3.amazonaws.com/tixedujegibex/grocery_list_template_for_numbers.pdf
    • https://uploads.strikinglycdn.com/files/f2222f4f-c3c8-45f2-8507-8562ef8fa8ec/34645790615.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e765.bin
1d375916bdabe506063484b09f4c24b38a0eb3782fbe1519c7eb08f741156686
pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 60424 bytes
font_01_sfnt_off00018347.bin
1a406b4c5efb99c546236ea5c81089cfc36209bca85c9aa4d6cd0bd4367c7375
pdf-font-stream PDF embedded font (sfnt) at offset 0x18347 5696 bytes
font_02_sfnt_off0001968f.bin
1c5f90636318d7a785c0d077830c67c66ff7666c8331c0330eb3896d7a92449c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1968F 11188 bytes