Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de28f3cd13fcf70…

MALICIOUS

PDF

80.4 KB Created: 2021-03-03 16:28:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdb4c9961629add5204fe51385a9e21f SHA-1: 7ae8682f219eb62d1981cbc9514a63eb3f0e82fc SHA-256: 8de28f3cd13fcf707cfd8588ddf250368201870dd6cc56b9c1f80c69c955a882
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'alpha male' and the wkhtmltopdf application, suggesting a lure to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=what+is+mean+by+alpha+male
    • http://tophomework.space/how_to_clean_bissell_spot_clean2829a.pdf
    • http://satofaxa.iblogger.org/74015036904.pdf
    • http://zonizubiro.getenjoyment.net/27772172506.pdf
    • http://vanlit.ru/3837800514741yn2.pdf
    • http://brumbum6.xyz/591569177358u0nh.pdf
    • http://jekenufakewe.mypressonline.com/juzafiregul.pdf
    • http://jofijuke.22web.org/kansans_for_life_voters_guide_2018.pdf
    • http://pressit.fun/thomas_merton_centering_prayer5xdjy.pdf
    • http://liolika-rsya.ru/application_for_a_job_letter_templatevs0cq.pdf
    • http://giwosoto.sportsontheweb.net/beyond_diet_sample_meal_plan.pdf
    • http://vukesis.iblogger.org/24105781287.pdf
    • http://evilcheats.fun/10th_standard_english_guide_downloadlfngz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sitozi/sorowevomozusudugutiti.pdf
    • https://s3.amazonaws.com/bupesejirijejus/40229850304.pdf
    • https://s3.amazonaws.com/luworizesupox/internet_explorer_10_for_mac_free.pdf
    • https://s3.amazonaws.com/loranoduzuja/72901944871.pdf
    • https://s3.amazonaws.com/xakapudakadu/18765371247.pdf
    • https://s3.amazonaws.com/zuguvoxoki/live_broadcast_app.pdf
    • http://pexomoduna.rf.gd/kezagibijinesuro.pdf
    • http://teluroluxeterez.myartsonline.com/widarudanamisotofikazirok.pdf
    • https://s3.amazonaws.com/rujimidujek/97078286324.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_off0000fc2d.bin
3e3d6ec1f8694f841a9f91645133c83aadae66d9468480f91b8cdd27e9f603aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 5220 bytes
font_01_sfnt_off00010dda.bin
d517ddc0ffd56827dd43717f806cd9ae032ca21f2f739e037608da42b4c738e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDA 10712 bytes

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