Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a4528e79027cc1…

MALICIOUS

PDF

87.2 KB Created: 2021-01-25 20:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bd0cd596312ff660aeec6e0d441170ad SHA-1: 1325a2fa321f8488021a94c9ed923bfa5364ade2 SHA-256: 86a4528e79027cc10a156f5eae2c78bc1c7d86408b352380bf52fa0089a35d8c
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'. Additionally, multiple URLs were extracted, some of which are flagged as unknown or potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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/123?utm_term=sail+training+international+youth+council In PDF document text
    • http://tiktokfrance.fun/farm_world_roblox_how_to_get_moneydfiwz.pdfIn PDF document text
    • http://kushtanash.ru/steel_pulse_true_democracy_songsoq4dp.pdfIn PDF document text
    • http://remont-pc.website/black_guy_short_haircutscbxxn.pdfIn PDF document text
    • http://tomorubi.22web.org/cholesterol_diet_meal_plan.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/babetafaperaxov/hornpipe_from_water_music_organ_sheet_music.pdfIn PDF document text
    • http://temekem.epizy.com/jaxapokujatofob.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/copperplate_practice_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/adjective_clause_worksheets_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/fajovadelariko.pdfIn PDF document text
    • http://petizitopebil.epizy.com/quickbooks_check_detail_report_total.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/62015513219.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/burinuwisiranowikujijomip.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/battery_saver_for_iphone_4s_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/74116660140.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/statistical_models_in_s_chambers.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/caged_bird_analysis_questions_and_answers.pdfIn PDF document text
    • http://tizedukef.epizy.com/jadurevamos.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 4972 bytes
SHA-256: 09d74b10ef93f9b100e5660eacec590f06f34d3f52bf2a1d7aef4790e48edd86
font_01_sfnt_off000110b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B7 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00011c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1A 10988 bytes
SHA-256: 6ae330919d215d37cf50d93b7510e07bc8946c62eca0426b583c31245970251b
font_03_sfnt_off000140b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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