Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afdaf8e8ba8a72c…

MALICIOUS

PDF

69.9 KB Created: 2021-01-17 09:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ddf7ad582e380f3c5cec7fa656c87cb0 SHA-1: 70704e33d4d03ec691a1a1a5e13bcf0b3be71901 SHA-256: 6afdaf8e8ba8a72c646bbcbd9df5ecd30e0db23202289171a106cac84282f5e6
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document's content, though heavily obfuscated, suggests a lure related to invoices or payments, which is consistent with phishing attempts. The embedded links, such as 'https://gettraff.ru/123?utm_term=wolfgang+deep+gloss+paint+sealant+canada', are designed to redirect users to potentially harmful sites, likely to download further malware or conduct credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gettraff.ru/123?utm_term=wolfgang+deep+gloss+paint+sealant+canada In PDF document text
    • https://cdn.sqhk.co/mowogibewu/hjajgha/lumuxegujisif.pdfIn PDF document text
    • https://site-1193936.mozfiles.com/files/1193936/5746195977.pdfIn PDF document text
    • https://firulasimasib.weebly.com/uploads/1/3/0/9/130969438/lurep-salasixesula-tegiweromorijo-duvosenujenex.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/ijfeoji/cable_selection_criteria.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/uieYgfx/zombie_age_2_apk_hack_download.pdfIn PDF document text
    • https://site-1178803.mozfiles.com/files/1178803/ps4_racing_games_compatible_with_steering_wheel.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/qylje0S/flight_simulator_2020_planes_with_autopilot.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/ridonamisegilev_nixubonane_jegip.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/kelukakeb/formal_greeting_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/informe_descriptivo_nio_especial.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/rcm_full_form_name.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/continental_drift_theory_modified_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/android_5._0_google_account_manager_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/65895907398.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/civ_5_guided_missile_upkeep.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_off0000d627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD627 5240 bytes
SHA-256: 743f12c261e53b950690312a57af4266aaa120583e4bcc5002ec04fbc9259609
font_01_sfnt_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 9900 bytes
SHA-256: ff14c1e2316517c9e9e1c5af1e0bd983e5b8ab2fbe96c200a8d6cf017fb2bdc3

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