Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba8fd8e55897ee8…

MALICIOUS

PDF

104.6 KB Created: 2021-02-22 22:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 81fc23f21cd668da4359076e3789855d SHA-1: 77e4220e827172d064859c08ef01622587ba461a SHA-256: bba8fd8e55897ee813f3c6cafe676f38b8c0b4872ff9f05e322a535b1048e28a
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with several identified as malicious redirectors or part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://yafferge.ru/strik?utm_term=6.5+grendel+load+data+cfe+223 In PDF document text
    • https://cdn.sqhk.co/ruvatagukas/gcid3By/snoop_dogg_s_rap_empire_apk.pdfIn PDF document text
    • http://wufobezivanas.iblogger.org/47278732612.pdfIn PDF document text
    • http://gedobitubojufu.iblogger.org/qualified_business_income_simplified_worksheet.pdfIn PDF document text
    • https://noxolawozin.weebly.com/uploads/1/3/1/4/131452883/jixitipanezitiro.pdfIn PDF document text
    • https://zapubotugor.weebly.com/uploads/1/3/4/6/134635013/pevoba.pdfIn PDF document text
    • https://vifoxofanope.weebly.com/uploads/1/3/4/6/134670603/minexazim_lobif_divotedur_tixamojobadur.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/fxYQMgg/h_band_smart_watch_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/ig2haTy/xipex.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/bibjb1R/77196082148.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/yW2jgif/strikers_1999_saga.pdfIn PDF document text
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/6220269.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/nokiva/caresource_medicaid_provider_appeal_form.pdfIn PDF document text
    • http://kigexozuzexozo.rf.gd/93071272195.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/devoted_company_guide.pdfIn PDF document text
    • http://fukorow.epizy.com/karaoke_cdg_player_software_free.pdfIn PDF document text
    • http://jenilonadal.rf.gd/does_baloo_die_in_the_jungle_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/danganronpa_v3_trial_answers.pdfIn PDF document text
    • http://mirokukuvo.rf.gd/16832879887.pdfIn PDF document text
    • http://dojovosis.rf.gd/big_time_rush_boyfriend.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/assassin_s_creed_identity_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/cordon_umbilical_infectado.pdfIn PDF document text
    • http://javajese.epizy.com/esp8266_arduino_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/residential_lease_agreement_format_in_tamil.pdfIn PDF document text
    • http://gegokuberil.rf.gd/391472646.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/4233283516.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_off00015a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A03 5520 bytes
SHA-256: 3b3995c8ed7bd19e62e0e32f2056e4254fe80e6e179d221bae2e816de54b6312
font_01_sfnt_off00016cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CEA 11224 bytes
SHA-256: b18173b68d1bc80549844a6cf0c418040a05e4be12a560b75b4d14926f8e58a3

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