Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7ce875c5907b47…

MALICIOUS

PDF

51.0 KB Created: 2020-11-01 05:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51a9116dad6a1cdf37d80c4a9a684d21 SHA-1: 148c8f63b5860a54ac10fab5ee498a65ac8c9626 SHA-256: 8e7ce875c5907b47cd63406a89de8ea583c49b88d7e7423bfe1a2c3ecfbb3fde
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links directs users to a known malicious redirector URL, suggesting a phishing or malware distribution attempt. The document's content is obfuscated but appears to be a lure related to game item crafting, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?keyword=gw2+legendary+weapon+crafting+guide
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5f9e1da0969ba.pdf
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f895e7378abf.pdf
    • https://cdn-cms.f-static.net/uploads/4407729/normal_5f98591070421.pdf
    • https://tojaluteder.weebly.com/uploads/1/3/4/3/134384479/2132763.pdf
    • https://jelopujepifo.weebly.com/uploads/1/3/4/3/134341958/vuvexodimabadoga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0502/6214/7225/files/vakagitakonakelobu.pdf
    • https://s3.amazonaws.com/wujapu/91894310577.pdf
    • https://uploads.strikinglycdn.com/files/981e6ff6-d5b3-4f3e-853b-a0a6eb1efc2b/biwenafakupupixijun.pdf
    • https://uploads.strikinglycdn.com/files/f99eb979-04fa-429f-a42e-662d4dca5ea8/topologia_malla_ventajas_y_desventaj.pdf
    • https://uploads.strikinglycdn.com/files/6a1f96d4-00c9-4e85-bfea-0d5e01e08486/widekariwajamibikozigowe.pdf
    • https://cdn.shopify.com/s/files/1/0502/7836/7415/files/72089899727.pdf
    • https://uploads.strikinglycdn.com/files/6d44485e-be85-44fb-ad5c-470616506f9f/bogliolo_patologia_geral_8_edio.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
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000558c.bin
a909daaa3493d89245c3b5912e61d1d24aca938a67d855e7471322ab1c3114bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558C 2920 bytes
font_01_sfnt_off00005fe5.bin
78b6cef2cb8ca03542d52306f3e1d02cff8a3253c7706a1ffa317eb0436e0011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 5500 bytes
font_02_sfnt_off000072ce.bin
a4a69bb9fe9a505b085ad08f7782414a20ec7873250730772143cc45ce33bd1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 5840 bytes
font_03_sfnt_off00008193.bin
52c167213c87a19de28bac1c58107b7e35ca7b12caee3d77ae4c27300c2967fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8193 11196 bytes
font_04_sfnt_off0000a7e1.bin
d40bada7374d944527ee8709ba51b02d0e9de25f73f9b8c24e62ae3778c0dd4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E1 16460 bytes

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