Malicious PDF — malware analysis report

Static analysis result for SHA-256 8adf7b5ac671a33c…

MALICIOUS

PDF

77.0 KB Created: 2021-02-01 15:38:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1e91fef98c88128e3a49e1a128ccf25e SHA-1: a6818fe44f11373553b5b1f3831de060a30a73f7 SHA-256: 8adf7b5ac671a33c01b264ca5e4dbab516dbce49c1138bbe174c709fe46df31d
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded URL and the ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to the URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/wb?keyword=mosquito%20repellent%20sound%20youtube In PDF document text
    • http://wavepolabipal.22web.org/happy_birthday_piano_sheet_music_beginner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453909/normal_5fcb54adf1491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_600f22f540440.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366348/normal_5fef3f0e3017d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_5ff97dbe0fb67.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/aMhjI0t/ionic_barcode_scanner_ios_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470029/normal_6013706c2e389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488139/normal_5ffaf2cbe5a3a.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/omicUgy/hitman_reborn_tsuna_and_haru.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/sYhh7ib/snappable_games_list.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/5eMnhcz/democracy_jeans_ab_technology_size_12.pdfIn PDF document text
    • https://cdn.sqhk.co/bedepekemat/NdheBid/carriage_kia_woodstock_georgia.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/GcEOgcH/1933753690.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488806/normal_5ffb5be6e18c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fd2ea2368b88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471114/normal_5fdfb27a3c18c.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/cFheXWX/97760135217.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/4cNhhje/dead_zed_unblocked_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/bJnshbu/cash_app_invalid_card_number.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/1r2kYYp/pazomemowerozaruxevabid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC95 5116 bytes
SHA-256: be200c89ae0da4691a9c689f88ad564e866df48dcaf10d4eed575ca43ec9d581
font_01_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 10248 bytes
SHA-256: a04332205250364f28a2dbe84848dd13ff35acf8f7e3fb14402a6cf8e031303b
font_02_sfnt_off00011153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 16200 bytes
SHA-256: 0c1475eca83358c511542958b7fec720950863bc0154e6c42ac174a493f6425d

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