Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe86236a49f6aa6…

MALICIOUS

PDF

76.2 KB Created: 2021-05-01 20:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a450b5cfdc865bfba107d351073f0d53 SHA-1: d42f3a0b4c25a7a0ea78f3227b149b2ba1ab5ff9 SHA-256: 0fe86236a49f6aa6ef3788392def1d24b1218b60deb33c9c0b0964d7b951a59b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are disguised as PDF files with SEO-friendly titles, indicating a link farm or SEO poisoning attempt. The document's body text is heavily obfuscated but contains metadata suggesting it was generated by wkhtmltopdf. The presence of numerous external URLs suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/strik?utm_term=whirlpool+washing+machine+accessories+near+me
    • https://cdn.sqhk.co/jabuvilir/ihAGKii/zombicide_night_of_the_living_dead_rules.pdf
    • http://prizinsta24.site/tazujisiwupovukapulvoip.pdf
    • https://cdn.sqhk.co/lazodadevab/dCge6gh/ringworm_infection_cream_in_pakistan.pdf
    • http://govnosiakxws.online/braun_thermoscan_ear_thermometer_manualzg43m.pdf
    • https://cdn.sqhk.co/remudejifi/eicA1jj/live_streaming_tv_channels_hot.pdf
    • https://cdn.sqhk.co/rifojimuna/Ghd3Phd/cheap_yellow_craft_foam.pdf
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/4399160.pdf
    • http://gogogoinst.xyz/dazofepiforutofesoposamt9rl2.pdf
    • http://tryici.xyz/how_to_network_securitynviyv.pdf
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/6839817.pdf
    • http://by-roof.ru/weather_report_standerton_mpumalangaosux6.pdf
    • http://stroiline74.ru/2005_dodge_ram_1500_gas_tank_removalg4yq7.pdf
    • https://cdn.sqhk.co/sirojenu/NiepKic/57313874814.pdf
    • https://zovakobazala.weebly.com/uploads/1/3/1/4/131456363/1891494.pdf
    • https://kidogotetivi.weebly.com/uploads/1/3/4/3/134375399/pudazavibokebeje.pdf
    • http://gvidilon.ru/pufibajeweduxudivujanigpl3w9.pdf
    • https://vewefididijos.weebly.com/uploads/1/3/4/5/134517371/vudinuwovaniwotu.pdf
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/8441772.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_6702f25faed74fa6b8532ffe7fc72e1c.pdf?index=true
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_4e0a3930d88144cab7286c6f38a38cf7.pdf?index=true
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_1c6f4907f22e42b78dfc4464b2b5328d.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb95.bin
ff3dbd7999d9f14a0366a1dbb167c7fb7cde6b9f5a080059eb2d3b01ec50c413		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 5452 bytes
font_01_sfnt_off0000fe0d.bin
e30c2bd36afbd8052954a8e9aea79a0fe134bd0825cb376597ef0a41d187be97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 10900 bytes

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