Malicious PDF — malware analysis report

Static analysis result for SHA-256 95913c877ac0dcae…

MALICIOUS

PDF

79.5 KB Created: 2021-01-06 08:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d8b4a75fa449d4909a0fdc30db8f0989 SHA-1: 996a5a73842c45dd81b4e9f30b2bb861a003beef SHA-256: 95913c877ac0dcae78cdb78b633efcadf24ec539a308573c33830f4d7d3c817a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/aws?utm_term=understanding+hazardous+chemical+labels+fact+sheet In PDF document text
    • https://cdn.sqhk.co/xasomegupur/hiijhcv/texas_longhorns_basketball_schedule_2018-_19.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/webipejonavuv/8516078074.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/40562165760.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/international_passport_application_form_online_fill_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9879bc3-9068-4320-bced-5b8e0df41b7f/mexadi.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/a4_skyhawk_dcs_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/elapsed_time_word_problems_3rd_grade_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/soligibifijafokepo.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/35096663860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a35a98-e270-4523-87f8-ae1511a64f4f/red_badge_of_courage_quotes_on_fear.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/super_mechs_mod_apk_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2738873b-284e-433b-a44a-57a38014141a/notre_dame_marching_band_covid.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/facebook_live_videos_to_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/ladifasip.pdfIn PDF document text
    • https://www.cancer.gov/coronavirusIn 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
    • https://www.cancer.gov/coronavirus'sIn 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_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 5616 bytes
SHA-256: f2c545ea09e9c63588922c45c1800d92a4c84c6a3d5cd7bcba5451fc3dc9d8f6
font_01_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 10956 bytes
SHA-256: b4d34a1ee8ae34c9713ed588c7c0a10cc1af70b00a3567d51e2c7033db2592c4

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