Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b297774dbe5d63e…

MALICIOUS

PDF

51.1 KB Created: 2020-08-22 14:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b764abaa82600f6a7905db06a3a0d60 SHA-1: 60e03bc9c6e2ea47f5318eb2227a06302406984b SHA-256: 5b297774dbe5d63e2e1e03a760390b652d08407074f9b946adf9d422dfebe0b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'Rockstar app pc' and includes the malicious URL, suggesting a lure to a potentially malicious download or phishing site.

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://ttraff.ru/pify?keyword=rockstar+app++pc
    • http://bizoz.steveellisworld.com/uploads/1/3/0/8/130814328/4639580.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/sheet_metal_bending_machine_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/0958/0961/files/how_to_convert_to_word_using_macbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/1775/5034/files/tcs_aptitude_questions_and_answers_with_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/mizikikilugezonab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdf
    • https://cdn.shopify.com/s/files/1/0445/4688/3748/files/quran_surah_al_waqiah.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/grade_12_biology_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5224/3861/files/second_conditional_exercises_2_eso.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/kemono_friends_dub.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a2d.bin
3fee9792d64e2530f6c9c96e55bda163dfa2cf4c30c92bdf0378cee57a46329e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2D 4968 bytes
font_01_sfnt_off00009b25.bin
eae4498af8c17592c2486575656a745119c7f5f40726d522d91aebc1c0415b6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B25 10844 bytes

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