Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3310d6c6351e6d…

MALICIOUS

PDF

50.4 KB Created: 2020-11-02 05:26:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 428d9f24c2e5b712b0d0d79b442547c6 SHA-1: 138b058f55f56358df7ba2658c506f90f51e31bd SHA-256: 4e3310d6c6351e6db9aa4886f5056ca40271ffe0f50e24f0f5da0f6572aa0262
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. The document body also contains numerous URLs, many of which point to link farms hosted on services like Weebly, suggesting an attempt to obscure the final destination. The primary malicious URL is likely intended to lead the user to a phishing or malware distribution 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://cctraff.ru/strik?keyword=dragon+s+dogma+best+mystic+knight+skills
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/f9ab5.pdf
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/6538986.pdf
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/390020.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdf
    • https://mizijuwewis.weebly.com/uploads/1/3/4/3/134392366/mawomed-rajegigalebo-matemawa-batuxulizojage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0266/8458/8232/files/why_use_google_domains.pdf
    • https://cdn.shopify.com/s/files/1/0483/9440/4008/files/the_source_wall_vs_battle_wiki.pdf
    • https://uploads.strikinglycdn.com/files/a3fd9960-e192-459d-a94f-fe17f4c498ec/lixigopera.pdf
    • https://uploads.strikinglycdn.com/files/1b38f472-0933-49a1-862e-af8b1ca90e87/talakekemaruxegemesi.pdf
    • https://s3.amazonaws.com/mexavofezoxi/casebook_in_child_behavior_disorders_6th_edition.pdf
    • https://uploads.strikinglycdn.com/files/4bbc71d6-e2ce-4ed9-984f-4ac39ba93ea9/wemotekutilimel.pdf
    • https://uploads.strikinglycdn.com/files/3662ff23-f0e7-42f3-a3c8-9ff81bf66809/nafazibulusavarumozogo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079f0.bin
f538d4621c112631110765e641599607cfdf3aedb9fe0072e39995935e7e1c11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F0 5448 bytes
font_01_sfnt_off00008c50.bin
ae4d6f08b92b084bc8506477bba1c2e94696b0ed5c4b9fa5174b382da99fc35d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C50 10212 bytes
font_02_sfnt_off0000aec9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC9 4324 bytes

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