Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ea465df536e1bf…

MALICIOUS

PDF

82.0 KB Created: 2021-03-19 09:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad129ca50b2a2e943eec6d6b3a6e474 SHA-1: 7502c3d36fef88821462d019a863b38d18037987 SHA-256: d7ea465df536e1bfd78ffc72f7608d98a129f25b4ebe5b5fae9be0cbc3e2ddcd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be generated for SEO purposes, suggesting a link farm or content manipulation strategy. The primary URL, 'https://ponafet.ru/wix?keyword=knights+and+knaves+puzzles+with+answers', indicates a lure related to puzzles. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=knights+and+knaves+puzzles+with+answers
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/wofulixokito.pdf
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/nipufaraboworob-vugamuwunom-keferoxufakugo.pdf
    • https://cdn-cms.f-static.net/uploads/4498801/normal_602a1ad863745.pdf
    • http://bukupiduge.mypressonline.com/why_wont_my_electric_water_heater_turn_on.pdf
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/zegiker-zofotesunovi.pdf
    • http://volamejabevakik.22web.org/painting_with_a_twist_orlando_hunters_creek.pdf
    • https://lenumerizak.weebly.com/uploads/1/3/5/9/135962539/3931619.pdf
    • http://pazefezos.mywebcommunity.org/gojexapixusezas.pdf
    • https://gukilebulasule.weebly.com/uploads/1/3/2/6/132682884/be5eca5a3c24e4d.pdf
    • https://cdn-cms.f-static.net/uploads/4387712/normal_5fd15ee6b3cee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e5c9e2cf-9447-4d54-85cc-3b0407752c60/what_books_are_like_the_selection_series.pdf
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_a55f7bb267ca4591a399d446fbb97a36.pdf?index=true
    • http://rowoniwetob.atwebpages.com/titebidusukemaforazowu.pdf
    • https://uploads.strikinglycdn.com/files/64089b4a-c181-4f11-b13b-9077d47ec4d7/37795608559.pdf
    • https://uploads.strikinglycdn.com/files/45adb2b8-20ab-47f3-af09-0f575dd1573e/70273532494.pdf
    • https://uploads.strikinglycdn.com/files/3eb9c5be-1712-4e34-9d09-d45982235d10/is_panda_express_bad_for_you_reddit.pdf
    • https://uploads.strikinglycdn.com/files/3a255f9f-a33c-46f6-ae07-a86f780e30d5/dell_e5500_laptop_specifications.pdf
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_dbf0a03dd67f4d64ac70ea4b86986218.pdf?index=true
    • http://zunedolu.rf.gd/dosarozagusudatudas.pdf
    • http://watusatuvor.myartsonline.com/wosafeb.pdf
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_693b1d739a5543d4b014f5520855c9e8.pdf?index=true
    • http://doruxexim.epizy.com/vitamix_5000_blender_parts.pdf
    • http://vezuzatutuxi.epizy.com/il_canzoniere_della_musica_italiana.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100b1.bin
6eeff1458280df7685a669de09468dfb9c1d8dd670993b37f3ae392b8dca7316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 5456 bytes
font_01_sfnt_off0001135a.bin
ca7631897fd442ebc0d219015027b8818bbd9df16b692cec0463a6c896bcd2c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1135A 11500 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.