Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c8085ad862f890…

MALICIOUS

PDF

82.4 KB Created: 2020-10-29 02:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a2aadff4d6759a2de8b72288578c12f3 SHA-1: e2eb7ebdac71eff819ecb65269f85035b6dcf8d8 SHA-256: 56c8085ad862f890cda86d8a84f30c6cef36e5046e48dd93985c39406e758822
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations by leveraging numerous external URLs.

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://ggtraff.ru/aws?keyword=kamen+rider+den+o+momotaros In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_5f952dc008493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f9723abcb804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5f8acb122bfe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_5f9a0cd581ffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f8f5f7e2370e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5f94194bba60d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_5f950e7c9960a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f9975816c01f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_5f935303eae0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f8ca2e86cb1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f87067c72395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5f9004c9e09ed.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5f9443c3e185e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5f8dfc4b24b00.pdfIn 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://s3.amazonaws.com/sinamozagemoger/57924320767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/schlage_keypad_lock_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/daihatsu_terios_2008_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5277/6603/files/anacondas_trail_of_blood_full_movie_watch_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4336/2715/files/northern_short_tailed_shrew_baby.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56A 15512 bytes
SHA-256: f4ea95f6cf0cef437ef7c3cb1e98e40bd42ace1cbad2621c39aee90e8de3052e
font_01_sfnt_off0000f776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 4696 bytes
SHA-256: fb5594782308d19d3a4d9c5dd19cbfc17e62625b2cb12fd739eb8caaa0664e95
font_02_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 11704 bytes
SHA-256: 6097ffff12747b093b10c38ef65ddd2185dc959dbf6308bbc6276f18ec733b99
font_03_sfnt_off00012d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D99 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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