Malicious PDF — malware analysis report

Static analysis result for SHA-256 9501bcdbefe28d26…

MALICIOUS

PDF

69.1 KB Created: 2021-01-01 07:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e904f7a702fc6f162a090daadbbca6c8 SHA-1: 8d9c7b02b591fc9d9f3279a5548ac57a15df169c SHA-256: 9501bcdbefe28d26c44668e82ff32b5c399419f63dd761745a52f79a92801fd9
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and a 'download button' heuristic further supports the conclusion that this document is designed to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=xtreme+drift+2+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fe1147b5bb05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f987f233f48a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f944bd8383ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_5fd354335ed8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5fb28222a4b19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390996/normal_5fe55fcdbb725.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/djjgiXb/gedisunalirepeweguwew.pdfIn PDF document text
    • https://wilunozuwi.weebly.com/uploads/1/3/4/4/134432110/dc93967a26d.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/dje59R1/final_fantasy_crystal_chronicles_crystal_bearers_walkthrough.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/teximikamukubo/best_collage_maker_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/variance_and_standard_deviation_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/iams_large_breed_puppy_feeding_guide.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_off0000d083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD083 5152 bytes
SHA-256: 18ce1d9f9761b8ed53a28926e6371a78f3b77f6dd846bf29536a81ca355bb8b7
font_01_sfnt_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 10604 bytes
SHA-256: cc38db041890d9b6259a99a97abfcc1a9517d68cff585b349f73558b7e2a4340

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