Malicious PDF — malware analysis report

Static analysis result for SHA-256 a117f41ce6af16de…

MALICIOUS

PDF

67.9 KB Created: 2020-11-13 15:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a50b5e7677796b6eabf6bc7cfdd0e404 SHA-1: d167fec7b329303c71f8118f1360d98691ca4243 SHA-256: a117f41ce6af16de875154a72bf04cf450f5828c5b89f7d9e3e6f998b7cbd5a9
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=destiny+2+rekindle+the+flames+modifiers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5f99b8f2d153f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f9a458d2905d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f9cb463cbc8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f8e7d199e8ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f8c60dc9eb98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d5ee73-b8d7-484f-bd58-d6f7bc4c0bb9/meaning_of_straight_through_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/the_crown_of_ptolemy_read_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/classifying_rational_numbers_worksheet_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/td_jakes_daily_devotional_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/the_spirit_of_leadership_by_myles_munroe.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/98462348407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85fcfc93-7dbb-4247-8b0a-36f825f01b78/babizutipamiguvir.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_off0000cbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 5444 bytes
SHA-256: b6b2c38d62f4d6448f727acae28cdfd228bf5ca7e9f6d9d7b4011db137215dab
font_01_sfnt_off0000de38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE38 10804 bytes
SHA-256: bda2952e41acac3149d88b82f94d18b858137ba90f6f27aad8469769422bb593