Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3077d45e68b588…

MALICIOUS

PDF

71.8 KB Created: 2020-11-22 11:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56dd15a26a924416fff5302de15c6fd8 SHA-1: 5761e6fc84f963ea6c003e398db7c6fb43811237 SHA-256: ee3077d45e68b588949f04c52e7b84395fcf7a6cab51749ee38644227fe80d6e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggests a malicious intent to redirect users to potentially harmful websites. The primary URL observed is 'https://trafficel.ru/123?utm_term=igf+1+lr3+cycle'. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=igf+1+lr3+cycle
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/vadewulusiter_jupezitejok_tuzadaru.pdf
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5fb3c31e3d336.pdf
    • https://cdn-cms.f-static.net/uploads/4383802/normal_5f8fa5dd5d740.pdf
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f93bb02a2bff.pdf
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fa5ff89c79df.pdf
    • https://pedutiwoda.weebly.com/uploads/1/3/4/4/134481784/6614431.pdf
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5f8d032a79865.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a3313ac1-20aa-44f2-aa74-e664d333aaad/yootech_charging_pad.pdf
    • https://s3.amazonaws.com/pesetufavo/sebozurozeferudiw.pdf
    • https://uploads.strikinglycdn.com/files/7c307398-76d0-4bc7-bf53-eb911a26a63c/forever_my_girl_script.pdf
    • https://uploads.strikinglycdn.com/files/60e46e7b-e4fe-4a44-91ab-c6d9e46a7d98/23515725250.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_off0000dbcb.bin
72f9e2a109925aee4791003998ce7746e83ec913897a95b360f7b2c13dbd3c1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 4916 bytes
font_01_sfnt_off0000ecb7.bin
6a9ade229266d880e8f44ff3fc2e6388361b2faa460832c48098018d7f55beb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 11088 bytes