Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d2406bf3753194…

MALICIOUS

PDF

52.4 KB Created: 2020-10-29 20:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 39d32cf370585fc05bb7203c72f376e1 SHA-1: 3a0a0655a783f25c5eeecb2db2c7002a240c88c7 SHA-256: 12d2406bf37531945c652ff455d0c43b5ff7912d0143a69ab3639a2f69324e0a
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to a URL that appears to be a lure for 'black coffee movie online'. The document body also contains this URL, suggesting an attempt to trick users into clicking it. While no scripts were extracted, the presence of embedded URLs and the malicious redirector link strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=black+coffee+movie+online In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f8fa3b67-55c3-42aa-8506-f4a05903c529/17641357249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a902dd-09b9-469c-8653-599d8adffe79/34653196319.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/89225467236.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/11650586131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b23d93-5f31-4f8c-af2a-38042eeaf7be/emily_g_johns_plano_il.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/fojawepolofapezav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64ae487-79be-45b8-a8db-37d3baf13544/livros_de_direito_do_trabalho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21d27df-098d-45ad-ba68-48d1e2887cdd/ruwinap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2416/1704/files/brush_calligraphy_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ce3151-124f-45f2-8a82-682e7220e764/35775574141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f93730-d043-4401-bc44-522dd5e1c2ee/53001870125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96cd6da1-0bee-435b-bca4-188ddb5b2265/game_theory_an_introduction_steve_ta.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/converter_em_autocad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4254/9145/files/49894484670.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/6768125031.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82ED 4636 bytes
SHA-256: 8322bc10e9c283342ac7d083781d1e3c289c78ffcaf8fca3d111321729284bd4
font_01_sfnt_off00009293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9293 10632 bytes
SHA-256: 2df47c69adf5fb0a2ea5900330f35619d3484a99126c26556d3523ab03e8ade4
font_02_sfnt_off0000b6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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