Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00527545f8f8ade…

MALICIOUS

PDF

78.5 KB Created: 2021-02-28 20:37:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 221ec82606089ad2a2c6b96e0e82aa71 SHA-1: 82f7b9ace47a7bed60e5006933ea962a1d428ef4 SHA-256: d00527545f8f8adef4e6e0e2d1b025be9f70732b2dc7dbce4101f528f3891def
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary external link, 'https://botokaw.ru/wix?keyword=graphic+design+contractor', suggests a potential SEO spam or phishing lure. While no scripts were directly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent.

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://botokaw.ru/wix?keyword=graphic+design+contractor PDF link annotation
    • http://vimobewawulipiz.mypressonline.com/printable_new_york_subway_map_with_streets.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/xusitimavadi.pdfIn PDF document text
    • http://domavera.ru/best_potential_players_fifa_19_cheap6rc4e.pdfIn PDF document text
    • https://wegotogad.weebly.com/uploads/1/3/4/3/134342574/xitodukobiwejafof.pdfIn PDF document text
    • https://jasefeneg.weebly.com/uploads/1/3/4/4/134489721/5690551.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/six_of_crows_tv_tropes.pdfIn PDF document text
    • http://presentinsta.online/section_12._1_forces_worksheet488i3.pdfIn PDF document text
    • https://fotelixufigowex.weebly.com/uploads/1/3/1/0/131071188/0a14c74109f.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/mimirulumofoxivepekubim.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/regovadeje/geometric_recursive_formula_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/libre_baskerville_free_font.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/sky_sports_transfer_deadline_day_reporters.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/bilitovomowaju.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/19420221007.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/job_handover_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/auralic_aries_mini_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/amu_application_form_for_class_6.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/vexonalorexej.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/application_format_for_job.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/civ_6_japan_strategy_guide.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_off0000f5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 5336 bytes
SHA-256: b4d4d9d92ef80504b16f3d4b292d13ad517a96b1f17b31c23ee43f7dcc04494c
font_01_sfnt_off000107d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 10704 bytes
SHA-256: 46bf86b2d674ad97fb7d1765a8de5e952d3e620f12dde51e0cdf6a58465de292

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