Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfb7e15721fec8f…

MALICIOUS

PDF

74.4 KB Created: 2021-03-25 01:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0ffd2d66ae992ac7716177c93d0bc47c SHA-1: c911fdeba6ce471b4113211c6d2c1480c1ef37d7 SHA-256: bbfb7e15721fec8fe2e0390b6b46b9ff9f2184e747e92e498b1648112323ab1c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/wix?keyword=cc3d+drone+manual In PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/pexifip-botanim-febotarovudovo-xivasono.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/91818539855.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/2010_town_and_country.pdfIn PDF document text
    • http://nunejabu.scienceontheweb.net/megitemorobiwugoliri.pdfIn PDF document text
    • http://fomigiv.mypressonline.com/1607638363.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/absurdist_fiction.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/ejercicios_para_aumento_de_masa_muscular.pdfIn PDF document text
    • http://jijizebopitimo.22web.org/asean_economic_community.pdfIn PDF document text
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/kuzil_dazozivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bojefej.epizy.com/what_album_is_dust_in_the_wind_on.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/49906646760.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/android_google_dark_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/vanilla_sheet_cake_recipe_11x15.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/graco_ultra_max_ii_695_price.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/responsive_html_blog_templates_free.pdfIn PDF document text
    • http://visunes.myartsonline.com/vasavetixidonupipojuzub.pdfIn PDF document text
    • http://kasesapat.rf.gd/google_cloud_computing_certification_training.pdfIn PDF document text
    • http://webimonok.epizy.com/home_office_uk_border_agency_form.pdfIn PDF document text
    • http://fijumusuxolegoj.atwebpages.com/hemoglobin_buffer_system.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/26765609067.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/jejawawulif.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/performance_appraisal_criteria_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/nesopowixixapomusuxasezig.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/mufititikedamewedi.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_off0000e52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52C 4976 bytes
SHA-256: 472ad6d90d2900e743edf187fad8ced01e32f17b79d97dd389a50d13584c41b2
font_01_sfnt_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 11304 bytes
SHA-256: d96f6d76c9e96636f703ccd4a24758950694ab4642324c2532eb1cb817176700

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