Malicious PDF — malware analysis report

Static analysis result for SHA-256 755fb486c589fbbd…

MALICIOUS

PDF

74.0 KB Created: 2020-12-24 22:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 63e29286091d1efc5c203da5eb7560a1 SHA-1: 72511487e8193a9521990de3fb2e6f0574da01d1 SHA-256: 755fb486c589fbbd4c97dfa28fdb97e6b0c353f9f5e5fd71a46a3af1041a09d1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffe.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, contains text related to 'Hornblower cruises san francisco' and the authoring application, suggesting a lure to entice users to click the malicious link.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=hornblower+cruises+san+francisco PDF link annotation
    • https://cdn.sqhk.co/sufadoma/PjfNFhh/97044696782.pdfIn PDF document text
    • https://cdn.sqhk.co/firimubujosu/RUaJKbP/duck_hunting_season_wi.pdfIn PDF document text
    • https://cdn.sqhk.co/jalizovi/jVgfAje/57063390811.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/lukepepe/raider_origin_gift_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcd2658-7c29-45d6-ac08-293dc46e2a73/zipido.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/guidelines_for_diabetes_management_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/rearrange_pages_online_sejda.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/xuwademegopunibogowav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a96c6a-f8fa-4713-a667-2c858a86ab29/pubuvekototumuriziz.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/36994134562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68306167-af99-460e-a760-29bb52906f5c/ee_cummings_you_are_my_moon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814e2e5f-2b47-46b9-a77e-dca96e61933c/nojodoverizekosadule.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/mojajig.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_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 5068 bytes
SHA-256: 2f8c3eb4bac784272715b6fa0542c1800f1609e6da7f6a6a67e057a930dae12d
font_01_sfnt_off0000f639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 10980 bytes
SHA-256: 28a6750a0e9dde3e2ee43ef5cf9246c65415e2ff8e5ff8d634ecc1a2ae1015f8