Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b855d14d9ed2af…

MALICIOUS

PDF

78.6 KB Created: 2021-02-19 01:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a8ee0d833ed5f8f1a24b0b085a0ef565 SHA-1: 82412aa40825f3d0dcdd93bf5a0c90124190c9cc SHA-256: c6b855d14d9ed2afa3dc90c7b6f16b009f4619ee836a9ea6261a0c20a3f302e4
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 'https://yafferge.ru/aws?utm_term=blackmagic+intensity+pro+drivers+windows+7'. This indicates the document's primary purpose is to redirect users to a potentially malicious site, likely for phishing or malware delivery. The ML classifier and ClamAV also flagged this PDF as malicious, reinforcing the assessment of a phishing or malware distribution attempt.

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://yafferge.ru/aws?utm_term=blackmagic+intensity+pro+drivers+windows+7 In PDF document text
    • http://aov.one/what_is_the_best_workout_routine_for_gaining_muscle_masszkak6.pdfIn PDF document text
    • http://forexgeeks.net/tupovuzqvxzx.pdfIn PDF document text
    • http://alteramaks.world/wiimote_pin_finderwqpfm.pdfIn PDF document text
    • http://gromstroy.com/apple_employee_benefits_401k_matchqazbt.pdfIn PDF document text
    • http://kwini-fini.online/7642972867228kpb.pdfIn PDF document text
    • http://garant-ritual.online/79203677438x0r0u.pdfIn PDF document text
    • http://naturalgood.space/kindergarten_worksheets_color_by_numbernto0j.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/gdiUbVV/rozunusisipukuv.pdfIn PDF document text
    • http://pro-konditer.com/bamixagutescdyy5.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/vososasoxumete/spell_checker_software.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/loronukubajupadalisila.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/jatajeropiz.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/centre_formation_chaud_froid_tunis.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/game_design_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/acdc_econ_ultimate_review_packet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/84085381781.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_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 5840 bytes
SHA-256: 6d973c139adef177a0d05eaa5ed45ddd3f5ec38221371a087dbccf0a6f9578b5
font_01_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 14912 bytes
SHA-256: 664967dbf3f369fe77e753575389c348789676edebced9181707eb8ee0b1fd24

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