Malicious PDF — malware analysis report

Static analysis result for SHA-256 940e3635cc0e6851…

MALICIOUS

PDF

74.0 KB Created: 2021-03-20 11:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efa3558d1f41e60c2f8742002823fe84 SHA-1: 5a50b2deb7a2edf5263cc3b9c456f44166439f3b SHA-256: 940e3635cc0e6851643c6558d8ab6da57e7d6f63333b7786302b197d3d9f0052
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm. The document contains numerous external URIs, with one prominent URL pointing to a malicious domain. The presence of a link farm suggests an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=death+note+manga+box+set+uk
    • http://cmbmarketing.agency/gopalogovuxuxjgr4.pdf
    • http://help-feedback-amzn8.xyz/voxesezelewivk0vnz.pdf
    • http://dmgameplan.com/pmp_project_description_examples5xu0y.pdf
    • http://white-x.fun/panasonic_viera_plasma_42_user_manualqwsky.pdf
    • http://wowitaly.pro/151925504460da2l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9a9c06d1-5afc-43e9-b7f3-19e4a4c2478a/dowonajukodosawe.pdf
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_1d759ad9041c45e69bc98073bbf472a9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/64cb53a4-d0dc-4070-96b3-a4abb6c8677e/99097510315.pdf
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_7eced56fd5274f72aabdd4aabc4358fe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b13f1ed3-19ea-4b95-882f-34fb769f870f/vezizatuvomedamadekanu.pdf
    • https://uploads.strikinglycdn.com/files/ae12933c-0b06-4bec-9235-f2b9bde27d7d/by_the_waters_of_babylon_song_choir.pdf
    • https://uploads.strikinglycdn.com/files/ca45364f-a641-417c-aa82-6fe08a923d81/fusuz.pdf
    • https://uploads.strikinglycdn.com/files/0458223e-40b0-4b42-ab62-682d3d674814/loloz.pdf
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_62eae5fc7a3441f6a17911568e8db067.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b4d40cbb-0c20-4eba-9cc1-a11a3edecb51/romazewelafade.pdf
    • https://uploads.strikinglycdn.com/files/ac625a78-4311-47a1-a12f-5e61a23ceec4/board_game_instructions.pdf
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_e5909d2049bc427198f4414ad49978e0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4b996fe2-7774-476a-bfda-883101025a44/31721394798.pdf
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_950393f25c2047ca850ad875830245f2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/252901ee-94b7-4d52-a9b8-1bed36e9a245/biwetufepetejavotomapo.pdf
    • https://uploads.strikinglycdn.com/files/ff09b5e3-9603-4f41-8ca0-453d8ba073b8/59171585686.pdf
    • https://uploads.strikinglycdn.com/files/034d55e8-f2dd-4003-9112-fb576c7b3177/what_is_the_declaration_of_independence_1776.pdf
    • https://uploads.strikinglycdn.com/files/64a6b2db-3205-454f-8477-0ecfdb645be5/same_old_lang_syne_piano_sheet_music_free.pdf
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_6e34ed958a7b4b61b9a17a59f510bfbd.pdf?index=true
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_f9a9740de061473ca021ea4a1a58f982.pdf?index=true
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_d57a7c1c30e543949c8c7bf598bada49.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_off0000e22b.bin
95049fc4de4ac370fc45342dd449c81ade785cb80315c1624c4cc6db63bbd08a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 5244 bytes
font_01_sfnt_off0000f3e9.bin
b639b5647dfaeee554e356f93bd54fd5663f8f4bc03e13cc59a73006ff76cb3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 11120 bytes

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