Malicious PDF — malware analysis report

Static analysis result for SHA-256 420e06ea5b5fa1c9…

MALICIOUS

PDF

72.2 KB Created: 2021-01-15 21:21:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: edcc98a70737f33dabe6baa93718f7a8 SHA-1: d8a23c9c4bc7bb7befb06e0f581147e73b6d8372 SHA-256: 420e06ea5b5fa1c99bd1fa32ff53ab19c489e9bdbc2118bb05288bba543944d0
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 to host a malicious payload or phishing page. The document's content, though heavily obfuscated, appears to be a lure related to 'study guide answers', a common social engineering tactic.

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://traffine.ru/123?utm_term=health+and+wellness+lesson+25+study+guide+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451756/normal_5ff4864c80233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5fd0e7a2a2009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5fc6af6ff39fd.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/jeo6ih2/tupifulesajazegojop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_5fd645e9bed7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5f9dc3a56e555.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367927/normal_5fed37ee8d959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5fd60b8ba40a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403422/normal_5fc8f9c0a80ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_5fd9e63eccf5e.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofovam/WBZkhie/2611535400.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/haichaz/amtrak_map_florida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461766/normal_5ffffafcae4c4.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/gapivegek/kivowisixogonezex.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/dejarunujomotijaka.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_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 5496 bytes
SHA-256: f87c40c8b2d0574a97f334530f110a7a83bb61fc29941069d8ad75bc6fdff118
font_01_sfnt_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 10852 bytes
SHA-256: bc01889608af1d400a73dac03050e3b20c5132e90596f7bc5d847cfb4e88926a