Malicious PDF — malware analysis report

Static analysis result for SHA-256 604b40b47320ae3d…

MALICIOUS

PDF

76.3 KB Created: 2021-05-16 12:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 017b11e2219a43f56ebefd3d1d806ac8 SHA-1: f2941624833487968538d8ba35db66c03cf8224d SHA-256: 604b40b47320ae3d7f7ee2df5638af874e0c50656f0ca6283e2227de41662222
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://baarspo.ru/strik?utm_term=arris+tm822+online+light+blinking PDF link annotation
    • http://zonaxam.iblogger.org/glencoe_advanced_mathematical_concepts_precalculus_with_applications_teacher_s_edition.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/wunenovumebin-nulaxaxivimil.pdfIn PDF document text
    • https://suvejeko.weebly.com/uploads/1/3/1/4/131407233/adf31b66.pdfIn PDF document text
    • http://pinoxisar.iblogger.org/tufegotetedovavasowuved.pdfIn PDF document text
    • http://netunesufugu.22web.org/best_performing_separately_managed_accounts.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/bezegoluzose/52844948107.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_08496a3110ce4683aa672dac43a5ea06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/sample_biodata_in_word_format_for_marriage.pdfIn PDF document text
    • http://ketened.rf.gd/80202747598.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/hampton_bay_ceiling_fan_remote_control_replacement_model_uc7078t.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/sylvia_plath_ariel_poems_analysis.pdfIn PDF document text
    • http://sasatabarodozow.epizy.com/how_to_write_a_law_case_study_paper.pdfIn PDF document text
    • http://fogalefudomuj.epizy.com/99163782567.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/61800414359.pdfIn PDF document text
    • http://winupenelipumo.epizy.com/chemische_formel_schreiben.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/android_recyclerview_adapter_get_view_at_position.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_44d82ea9cd104d3bb4d865f7302a252b.pdf?index=trueIn 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_off0000ee72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE72 5408 bytes
SHA-256: 5796b93bcaa423272fbc90c98bd9f079ba2c29e27b0378049fe66fd9958c52d6
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 10380 bytes
SHA-256: 891cb2a892246ba94bfb2617d85aa493d54afe94360db675a855f8d1efa30aa7

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