Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b47b93a0c5a516f…

MALICIOUS

PDF

73.7 KB Created: 2021-01-30 12:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bbcc9b5558aeddc90fe94bc73d17893a SHA-1: b43c572459546085ad10e54f0f9150f141281f96 SHA-256: 8b47b93a0c5a516f337b1706aff4c9e1485371ce853dd6e0b853f673e4893649
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to host or link to harmful content.

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 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.
  • 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/123?utm_term=champion+ford+erie+pa+phone+number PDF link annotation
    • http://esportzmlevent.com/3278293986ym2b6.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/g4tjast/loop_recorder_vs_leadless_pacemaker.pdfIn PDF document text
    • http://fherixq.com/sogebank_routing_number6ssz5.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/jumovaxazereda.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
    • https://s3.amazonaws.com/sefabe/android_studio_change_name.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/the_bastard_of_istanbul_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/40082847622.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/bhosari_midc_company_list.pdfIn PDF document text
    • http://kagapari.rf.gd/fofatoboxedovel.pdfIn PDF document text
    • http://vubalek.epizy.com/cryptogram_puzzles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/37799867254.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/fortiswitch_1048d_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/sebabuzusimelozi.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/gonojokigegesifonuv.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/application_form_online_registration.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_off0000d6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E0 5036 bytes
SHA-256: 2271dca182bc8f890bb5912991b5c62ead92eb6795250cccae72cb7f66c0f60f
font_01_sfnt_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 10448 bytes
SHA-256: 1b3f4be647042a96b61c67bb46fe6ce526fdc53ac8f1c0fc597dba6fb62dc762
font_02_sfnt_off00010b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B97 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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