Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcd6bff04acbc95…

MALICIOUS

PDF

71.2 KB Created: 2020-11-20 02:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dfc1421cb0190580620c6d4bb0aab8b SHA-1: 19c9cd24e7dcb745dc274717e1598a09655b0f2f SHA-256: 4fcd6bff04acbc95fc61c93f7ddcd9dee75d051f73b8f3a582e933386ba31bba
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities.

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://traffking.ru/aws?utm_term=valentine+day+movie+songs+free
    • https://posexabilibo.weebly.com/uploads/1/3/4/3/134350455/6806609.pdf
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5f9dfd4bee044.pdf
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/6116837.pdf
    • https://variwigegepug.weebly.com/uploads/1/3/4/3/134348450/2706084.pdf
    • https://cdn-cms.f-static.net/uploads/4426261/normal_5f9ed13452044.pdf
    • https://cdn-cms.f-static.net/uploads/4467007/normal_5fb6eebc41afb.pdf
    • https://cdn-cms.f-static.net/uploads/4481695/normal_5fa7b04b502bc.pdf
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5f8ccd77f19fd.pdf
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/5842945.pdf
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5fb424f3dda84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vexosafugunu/77598048723.pdf
    • https://s3.amazonaws.com/gelawiweza/27659656270.pdf
    • https://uploads.strikinglycdn.com/files/32f104a8-8f00-41ae-8ce9-73661187cdc6/sepibop.pdf
    • https://uploads.strikinglycdn.com/files/83a1332b-1bef-4834-88a2-a5c0f52109d8/anatomia_y_fisiologia_para_enfermeras.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_off0000d922.bin
9b751010464f566e1e978107c1f6cfbbfd5dd482643d67231be143335017d1b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD922 5356 bytes
font_01_sfnt_off0000eb58.bin
da6c11a1c2ee1563a8fe4f86850b5050e993393cb23792e14a73db06e544d1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 10928 bytes

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