Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8877004333a8e3…

MALICIOUS

PDF

73.2 KB Created: 2021-02-23 19:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1757583c580ff5597f14c34e49d668c0 SHA-1: 5a743cf1d3cc6d4371ef1a500ebd157125b0a822 SHA-256: 6b8877004333a8e3c1110665a8b72c61cd2a58ec843e85d25c2c79a8ae4af013
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The presence of embedded links and a 'download button' lure further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://jottigo.ru/strik?utm_term=can+i+do+dual+employment+in+india PDF link annotation
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/58b9fb2dc1ef.pdfIn PDF document text
    • https://linikakisevokeg.weebly.com/uploads/1/3/6/0/136098208/dccba68993eeacf.pdfIn PDF document text
    • http://fujepopini.22web.org/fafewoj.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/88e5778216.pdfIn PDF document text
    • https://fizijoju.weebly.com/uploads/1/3/0/8/130814030/wokedifoxozutez_fusiniwela_kajufudakaxidu_rugufenux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bozawozu.epizy.com/12144295853.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/dogufipekenoleze.pdfIn PDF document text
    • http://zexolaxew.epizy.com/64427058284.pdfIn PDF document text
    • http://durunorutap.epizy.com/47042471843.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/burn_out_song_lyrics_karan_aujla.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/giza_dreams_sheets_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/guided_killarney_national_park_walking_tour.pdfIn PDF document text
    • http://refufigatuzar.epizy.com/excel_vba_format_cell_value_as_text.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/38151661706.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/75664418916.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_off0000e45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45A 4836 bytes
SHA-256: e0fbab72e151f435e507dc616a18bdf18eb6484bb185a52bad243da16229d8fa
font_01_sfnt_off0000f4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C2 10272 bytes
SHA-256: 496b1e5fbbe621fe28efa7af0cc45caa7547a1e6a7320269132ef1dd784436c0

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