Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b4cc7f74dfc14d…

MALICIOUS

PDF

54.5 KB Created: 2020-11-06 07:04:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3d79797dee4061475bd8b9b0151834cb SHA-1: 8c91a18c22b1a2370d149cee82ac7f119670f0ab SHA-256: 04b4cc7f74dfc14dd68d6fee89a14e18cf355c2417c9f8b73312039f2234936e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or further malware delivery.

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://traffmen.ru/strik?keyword=pascal+triangle+c%252B%252B+program In PDF document text
    • https://jivarogogujuno.weebly.com/uploads/1/3/4/5/134513891/170d74541.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/8601808.pdfIn PDF document text
    • https://tivurenufetoza.weebly.com/uploads/1/3/4/2/134235987/jewumabixut_vudadefojirew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5f9d938d8e671.pdfIn PDF document text
    • https://pixogapowirotuj.weebly.com/uploads/1/3/4/6/134641161/sulobegafovogov_xamaxupove.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/066d862c-9227-48fa-8513-78e09719a225/nirox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3edebb-c37d-41ee-b46f-a1f579c92f13/exo_xoxo_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cf7e63-58f5-4c41-a767-1c336eb265e4/83471355801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ce2755-f2c9-45ab-a6ef-82d039bb3562/76757261443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09dc011-a9b2-4ec8-8eae-26b45a4fbfc6/hollow_knight_bank_gone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1f433d-b5d0-43fb-8a23-ad8f784c6b30/sports_clips_coupons_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321dd304-4ecd-4e4c-abc0-929886a696d6/63789381076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c24f0c-0100-4643-92f8-bee1e4db65f8/19182100491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08b3c5a-78da-4ba2-a74c-87539db6d7ce/55570894228.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_off00006cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 11896 bytes
SHA-256: ccf3deb7df086bf3119855cfc36f73d8c1b3e989905c1873f8a5538c6219607f
font_01_sfnt_off0000945b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945B 5256 bytes
SHA-256: 3754f28587a099f13df6253c353439312b43054ab4294babedcef55af4d5b93d
font_02_sfnt_off0000a625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA625 11244 bytes
SHA-256: 3c6ee0f6a11ae1998b693a3bf2524dcdf1687af482ccff7f6123328507114ae7

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