Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f2c4a2df7b2225…

MALICIOUS

PDF

84.9 KB Created: 2021-03-09 06:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7f0e41ee6d459e471496e1126f8d3bd4 SHA-1: 1ea4c254347bb58157373a0ef84790db15e62811 SHA-256: 09f2c4a2df7b2225a2cf17860aec5fcdb3b165804287772e7c482a13f8f0382e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://lozipotod.ru/strik?utm_term=weight+training+schedule+pdf PDF link annotation
    • http://zobotalemogi.sportsontheweb.net/what_is_a_social_thinker.pdfIn PDF document text
    • https://wewogubebomev.weebly.com/uploads/1/3/4/6/134692169/374d833a.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/q_see_security_camera_manual.pdfIn PDF document text
    • https://lekevemu.weebly.com/uploads/1/3/0/7/130776436/tofovalosut.pdfIn PDF document text
    • https://jenitexul.weebly.com/uploads/1/3/4/8/134859983/xevukimuzaderude.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/72895192941.pdfIn PDF document text
    • http://datidiveke.iblogger.org/88940123282.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/569940.pdfIn PDF document text
    • https://wanesutilujat.weebly.com/uploads/1/3/4/8/134868149/butiweri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikopenopod.epizy.com/how_to_day_trade_penny_stocks_on_etrade.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/chhattisgarhi_gana_kaise_kare.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/whatsapp_without_bluestacks_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/63175468018.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_fd076b02417242df85e21e163597c5e2.pdf?index=trueIn PDF document text
    • http://kusababi.onlinewebshop.net/the_solution_of_differential_equation_dy_dx1ex-y_is-.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/38240873136.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/petsafe_yardmax_transmitter.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_bf0eb46bc9564262bd6bf9e7c84e338b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/58293594897.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/soundhound_music_apk.pdfIn PDF document text
    • http://puguvapalovuzub.rf.gd/amapiano_2019_dance_videos.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/13504617568.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/vovoserofazorezinud.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_off00010dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 5432 bytes
SHA-256: 21ff00c3f10a04036d124af9653119987fa17d1379a259b64c60683a7c9b2620
font_01_sfnt_off0001206e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206E 10948 bytes
SHA-256: 25928594395f867817fab317ed812da84ca2dcc82b9700b7fdfae9d2fd311224

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