Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae93d491742eda2a…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 01:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 029fb48d06095723c09abac9810eeef8 SHA-1: efaef0ab7ca42a1e0cacdf4ce672b8158dcbef9a SHA-256: ae93d491742eda2ab7799c1baebd746a55a3fe53aad42894587d11f3b9db9566
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'golowaki.ru' and containing 'autocad mep 2019 tutorial pdf' in the query string, suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://golowaki.ru/strik?utm_term=autocad+mep+2019+tutorial+pdf PDF link annotation
    • https://cdn.sqhk.co/puwonereb/XA0Wegd/lemonade_hero_best_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/Xpghdha/gubeforinesolefizigu.pdfIn PDF document text
    • https://xegiduburap.weebly.com/uploads/1/3/5/2/135294675/f57c09153b0.pdfIn PDF document text
    • http://soguged.22web.org/kikajoxojamol.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/numamotizuv-putelijujib-metedu-xuridad.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ixhchfY/foluzopovuzuvapedibifowek.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/foSijtc/e_aadhar_card_face.pdfIn PDF document text
    • http://ritowozotemazo.22web.org/how_many_calories_in_robertos_rolled_tacos.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/word_export_to_macro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://firuwasuwubo.epizy.com/stem_and_leaf_plot_worksheets_7th_grade.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/jalogagagexanevusibaduxor.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/checksur._exe_for_windows_server_2008.pdfIn PDF document text
    • http://firosuvidafodi.rf.gd/2090349317.pdfIn PDF document text
    • http://wodefelid.rf.gd/2020_calendar_printable_one_page.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/apple_magic_mouse_2_not_working_properly.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/formal_dress_shops_in_baton_rouge_louisiana.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/31269750194.pdfIn PDF document text
    • http://fowakoleviwamop.onlinewebshop.net/62046365156.pdfIn PDF document text
    • http://xelepidozagetof.epizy.com/aerated_lagoons.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_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 5596 bytes
SHA-256: 0011b35c8a080dfb6cbe5a355720a09ecbedd478fd44b10bcebb1bfb6f6a79c8
font_01_sfnt_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 10788 bytes
SHA-256: c762c1c8648df42a9a89ad5f8d1a2697514a453eaf6742f256f8cf06df264d4f

Open this report in the interactive analyzer, or submit your own file for analysis.