Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c54e2df53670954…

MALICIOUS

PDF

35.6 KB Created: 2020-10-06 20:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 404e43439396a3cd2967aef119a60ee1 SHA-1: 9d4a6c1ec1c64f2f5f9710444ae650eec75aed51 SHA-256: 8c54e2df53670954a3e3a4da292d931d020bee1bf9638e81266935a9b36be7a0
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The presence of a password-protected archive lure also suggests a multi-stage attack where the document itself is a decoy to obtain credentials or facilitate the download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cctraff.ru/strik?keyword=alcatel+one+touch+5036a+rom In PDF document text
    • http://files.rossluthin.com/uploads/1/3/0/7/130776277/pamutojiwetiluxirago.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/1/0500/0727/7718/files/pitilufasix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/wopokenunisuxovedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/90049811776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9458de5d-13c7-4f18-9ca8-fffb31ab6e69/jaxigetalabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733123ad-0f18-4a1e-b4fa-d2b70695ac0d/74870342173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f12cab7-81d9-4f2e-b529-a26cf8010942/jobonafepetovajiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e512c211-4444-47ae-ab6e-442e99d8cb4a/89902010062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fecf18-a74d-4856-838d-291666de8289/86179258640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/14530129999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3399/7724/files/strike_pack_fps_dominator_xbox_one_manual_espaol.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_off00004ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE4 5436 bytes
SHA-256: 192ae0d09cd8e810a0c04b6a1f7690638198d67476ca856cdb302ecb167c4a39
font_01_sfnt_off00005f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 10284 bytes
SHA-256: 73a49d432c4b391afbe80c0d334865d379a83ee6e17517c8db19e6a592d25270

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