Malicious PDF — malware analysis report

Static analysis result for SHA-256 5268d1686af80d3b…

MALICIOUS

PDF

78.9 KB Created: 2021-03-24 18:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b3ecd559bf270d08b4fceda70eefe216 SHA-1: d9b69444488d74276aea3bf34dee0600183da692 SHA-256: 5268d1686af80d3bce45b3d5091dede9bac94e200178a993591f903368e35da7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious content. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a search query, reinforcing the lure of finding a specific PDF.

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://gimoguvi.ru/strik?utm_term=history+of+modern+world+pdf+in+hindi PDF link annotation
    • http://the-job.ru/mawuvzuzti.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/donupofax.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/acuerdos_de_paz_el_salvador.pdfIn PDF document text
    • http://rabota-plus.club/wewumobuzagezetelofukipulqd3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5ff29cc9d3776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_6020aa43a28b5.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/956542.pdfIn PDF document text
    • http://itanto.space/82129447989ilmhz.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/favefujarop.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/vefefunivasotujusupite.pdfIn PDF document text
    • https://dudumopovidin.weebly.com/uploads/1/3/4/3/134308156/zuxutitizumezibejoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479917/normal_5fd2e0f222191.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://subogerilazelo.atwebpages.com/44963069019.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/citizen_blue_angels_watch_stopped_working.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/proverbes_anglais_franais.pdfIn PDF document text
    • http://vusomafolu.rf.gd/blindfold_chess_training.pdfIn PDF document text
    • http://volififujuwimi.epizy.com/castrol_magnatec_10w40.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 5016 bytes
SHA-256: d90b8361b427049f79ecccf3c19e3383eff81cf006776340e4252d989bba0ed4
font_01_sfnt_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 10736 bytes
SHA-256: 617641664196f631ee62002d3ba28cdbddfbe66e11cec4b74d73b59506fa6297
font_02_sfnt_off000120a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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