Malicious PDF — malware analysis report

Static analysis result for SHA-256 978aa210728380bf…

MALICIOUS

PDF

67.4 KB Created: 2020-11-26 06:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdee71174abbf0f4caaf50e396b017b2 SHA-1: 026bcaba0a48dba6f670c2b00b4d176ee4585227 SHA-256: 978aa210728380bf6405b1bad58b5988d2747d15e52c906810ed093470d13570
104 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. The document contains an embedded URI pointing to 'traffnew.ru', which is likely a malicious download link. Although no scripts were explicitly extracted, the PDF structure and the presence of a download-related heuristic suggest an attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/123?utm_term=showbox+apk+no+ads+2019
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/6354638.pdf
    • https://cdn-cms.f-static.net/uploads/4450878/normal_5fb3c8208e871.pdf
    • https://bapijinujaf.weebly.com/uploads/1/3/4/7/134700097/9322635.pdf
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/zovunodafad-xugasamoko-doromobegiv-zakuzesive.pdf
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/cf174649f1ab09d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f5858b4f-9c70-4bae-927f-b95c993c0067/business_math_worksheets_with_answer_key.pdf
    • https://s3.amazonaws.com/tobobowu/accelerated_reading_answers.pdf
    • https://s3.amazonaws.com/jinabom/35719678597.pdf
    • https://uploads.strikinglycdn.com/files/cd7e762d-8260-4465-85c6-24bddb34f2ad/70997049311.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_off0000c980.bin
7cd53551e36d963df6e321cfec4a1b5b524da10614270093c86fdb9c061997d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC980 5868 bytes
font_01_sfnt_off0000dd83.bin
b466532d66d1f33d334fc246b2855e62e8595afc37c3a13de21c2bbfc8ce2bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD83 10664 bytes

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