Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c20860b43d37ee…

MALICIOUS

PDF

73.6 KB Created: 2021-03-03 17:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 1b18818c551eec1c539e22c9f7c96229 SHA-1: 279dc669006b1d073b7527093bc62aff0ae55772 SHA-256: 77c20860b43d37ee3c7a6112437d2db54247630649cb1cdc5369c50743b73394
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic. The document body, though heavily obfuscated, appears to be a lure related to 'The bluest eye character chart'. No scripts were extracted, but the PDF structure itself facilitates the redirection to these external URLs.

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.
  • 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://jottigo.ru/wb?keyword=the%20bluest%20eye%20character%20chart PDF link annotation
    • https://dudixugodibemuf.weebly.com/uploads/1/3/1/4/131406925/zovolapigolimu.pdfIn PDF document text
    • https://cdn.sqhk.co/rixakowu/gehcxih/51207532752.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/price_of_used_toyota_corolla_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jjcDjcr/62652745122.pdfIn PDF document text
    • https://cdn.sqhk.co/woledowo/jchcnjh/ev_connectors_coupon_code.pdfIn PDF document text
    • http://jijuduli.mywebcommunity.org/madame_bovary_movie_2000_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/IVBDget/grand_theft_auto_iv_download_for_phone.pdfIn PDF document text
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/wesato_povawe_mozumasowozeto.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/48955326350.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/intex_pool_filter_pump_instruction_manual.pdfIn PDF document text
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/525752.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/5181860.pdfIn PDF document text
    • http://fakibukilab.22web.org/get_application_x-_www-_form-_urlencoded_c.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/caracteristicas_del_marketing_digital_segun_autores.pdfIn PDF document text
    • http://dedarijaluwonu.22web.org/yesterday_violin_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/ijgKcMq/escape_from_alcatraz_movie_download_300mb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sewamos/business_analytics_data_analysis__decision_making_6th_edition_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/bideze.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/kennen_guide_ad.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/hp_elitebook_8540p_battery.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_off0000e61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 5080 bytes
SHA-256: e6250626c01e3fab864b0c806c559696687278fad1197d5707a5b667df4db6a1
font_01_sfnt_off0000f766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF766 9948 bytes
SHA-256: c027a0a7ea49bb1cdf7e2e0e199b4d84862b4f0295ef07b6b5df6bb93d08971e

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