Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ffd6a0c5fc2a3c…

MALICIOUS

PDF

68.7 KB Created: 2021-03-24 23:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 28274018f01a18fa1b38ca08176891cb SHA-1: c41242f7757faa984e6a614f90cf9b8ec6e2ccc1 SHA-256: 75ffd6a0c5fc2a3c796ada2f5b0e3d147067a3ff77c3de67e1d8542b01cabb60
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicative of a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/wix?keyword=what+young+india+wants+pdf+ebook+free+download PDF link annotation
    • http://tanivikovome.sportsontheweb.net/anthropogenic_impact_on_environment.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/born_a_crime_chapter_1.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/definicion_de_bienestar_laboral.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/types_of_curriculum_development_slideshare.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/7546854976.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/amiodarone_davis.pdfIn PDF document text
    • http://comp-arenda.site/big_bang_theory_cast_missyx8gf2.pdfIn PDF document text
    • http://vashobereg.com/weber_bbq_best_price_perthz1g44.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/31630382777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikuzekoxo.rf.gd/evenflo_tribute_5_convertible_reviews.pdfIn PDF document text
    • http://sedobuxekazadi.rf.gd/uefa_champions_league_2019_games.pdfIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/waktu_solat_pulau_pinang_2020.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_ce40afc8338242ed8f12305b2b10e99d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19ce517-5015-437b-8219-dd02b98fc594/is_2013_dodge_durango_a_good_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dcb6130-f39d-4113-a066-c6788ee717e5/mtd_snowblower_tune_up.pdfIn PDF document text
    • http://pidusagi.atwebpages.com/kinawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e917a9-d947-463d-99fc-1fbfe592d769/buwogowarirogasiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5802c5-19ab-4706-8a3d-d0e16593f08d/wakuwe.pdfIn PDF document text
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_adefd51ce8794169941749ef10cfbbe4.pdf?index=trueIn PDF document text
    • http://wigezenefibi.epizy.com/80210609147.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_off0000cd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD35 5712 bytes
SHA-256: 6910fb1c99c9da25b6d844c3bd424336d46787ca1b2f78cd9ba3b907df996c80
font_01_sfnt_off0000e0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C7 10620 bytes
SHA-256: c8a93994e61492f435061fe8f35afb35c7ccde869b345daac5e85b98c8ab490b

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