Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d341b8bf1e8131c…

MALICIOUS

PDF

44.0 KB Created: 2020-10-27 20:19:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6052aa9cc6fccc2ce209bc265345f682 SHA-1: 1a3b3571899b2a96abc573f5f32da25e0ae5884f SHA-256: 6d341b8bf1e8131c7610ec834c0608345125c245dba88d57c1af765052809928
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to suspicious domains, and is flagged by a machine learning classifier as malicious. The document body, though partially corrupted, contains a URL that is also present in the heuristics as a known malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, 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://ggtraff.ru/strik?keyword=third+party+legal+opinion+report+1991 In PDF document text
    • https://vigaziwow.weebly.com/uploads/1/3/4/3/134322068/2739834.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/93049f265a0000.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/fd2adebedd29.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/2953785.pdfIn PDF document text
    • https://sodumixiseto.weebly.com/uploads/1/3/4/3/134311801/aef3d639c.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/736aa.pdfIn PDF document text
    • https://kunisalopug.weebly.com/uploads/1/3/4/3/134315348/zoxufipuruwi.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/nakofiruzifanu-dexur-wavut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8173/1748/files/41737341290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0817/9353/files/broomfield_county_jail_commissary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9889/0150/files/48153249325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/5485/8908/files/bay_de_noc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1359/9143/files/95634237667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4382/7095/files/region_free_dvd_player_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8330/8962/files/43220155146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/43282705694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2916/3932/files/vogele_paver_1800_3_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3078/8268/files/lipodakumoniladopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3509/7770/files/download_xchange_viewer_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051d808b-a1b2-4f85-84e2-1b5dd7b25cf9/suwibisaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665bc217-8ec8-464a-a323-5c49e61c171f/rigiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d69f7d4-e52a-4d72-9f22-1b67f24480b9/34558784126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ffb3108-c4c6-4a8c-b24f-9e0c49051fad/mefuwazawuboz.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_off00006c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C98 5304 bytes
SHA-256: f83d1bac7dac4b1c130cb4da2847350ef10e48704a6c1e4694483cea99b739bc
font_01_sfnt_off00007ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA3 10268 bytes
SHA-256: 9b8a729877a23b51c43624dd175035fd5b078e51cbeccf6fea81851a9e6587b8

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