Malicious PDF — malware analysis report

Static analysis result for SHA-256 59636b38ed24ce63…

MALICIOUS

PDF

43.6 KB Created: 2020-11-07 03:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 370bbe6636e84207cab0b81d3a3aa754 SHA-1: 009e3bd9cc5f96b8d5dce4299d2b31e3e83dc623 SHA-256: 59636b38ed24ce63bc045da4905629d2ada37ac2ef2129c6978e8efc1cf98725
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirector infrastructure, indicating a phishing or malicious redirection attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags the URL 'https://traffine.ru/123?keyword=girls+games+plaza+cooking+games' as malicious. The ML classifier also strongly indicated maliciousness.

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://traffine.ru/123?keyword=girls+games+plaza+cooking+games In PDF document text
    • https://torawatuxopo.weebly.com/uploads/1/3/4/3/134379163/nupaj.pdfIn PDF document text
    • https://furewerojerekez.weebly.com/uploads/1/3/4/3/134370242/raliderododuwud.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/f37aab.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/2670979.pdfIn PDF document text
    • https://valakafugajebe.weebly.com/uploads/1/3/4/3/134330742/fevexetaf_zegizajizosigub_jazolamaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sixenuw.files.wordpress.com/2020/11/44219253098.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/constitutional_scavenger_hunt_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76091914-2397-4f87-b05b-e22a12612e9d/lefavinuxikepox.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/ubqari_magazine_february_2019_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0d8a85-68bc-4f07-995f-abcce131ed17/muxumurikuviredami.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/world_conqueror_4_hack_download.pdfIn PDF document text
    • https://nixeporebumo.files.wordpress.com/2020/11/anamnesis_de_enfermeria.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/bunadirururigudivenijato.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_off00006bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC1 5400 bytes
SHA-256: 6c60d51dd8300dbeb18bcc96d7999c55a653177cb5705383537d420ce99e5b4b
font_01_sfnt_off00007e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E17 10404 bytes
SHA-256: d2ce1b41c1a798c66e46c5f256f6153a959fd360d2995a17c223071b35953bda

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