Malicious PDF — malware analysis report

Static analysis result for SHA-256 29de7bf3c5fd5446…

MALICIOUS

PDF

73.9 KB Created: 2021-03-27 17:14:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 360fccfc09d49f21942bcecf4ef68387 SHA-1: b8d6c199ca265cbe5c71c54718b82289ef783f2c SHA-256: 29de7bf3c5fd54461eee6b3b846559340e6b99bd7c4dce6c7e315215a87c090d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The embedded content appears to be obfuscated or corrupted, but the presence of numerous external URIs strongly suggests the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/123?utm_term=autodesk+design+review++64+bit PDF link annotation
    • http://mifetuvoge.22web.org/kinds_of_volcanic_eruptions_worksheet_answers.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/1602387.pdfIn PDF document text
    • https://rizowowomupi.weebly.com/uploads/1/3/4/3/134344214/ded8d82a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_8a612df2a277406e9ed9f454f1701fd4.pdf?index=trueIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_0cac1ce26c1540a1ae6c1e594d663fe5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/badger_youth_basketball_uniforms.pdfIn PDF document text
    • http://tobezizasatixib.epizy.com/32550849715.pdfIn PDF document text
    • http://fivasire.rf.gd/58331159007.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_bd4c55837a65449f9cf3257718b1a137.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8aa9d2-a2e9-4348-9c42-cb8125fde86e/altec_lansing_life_jacket_2_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605b5a05-08d8-4cc5-a245-e7be0fea1eef/togifunoreritafezuloxavew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c9aca7-2967-47d0-8724-3f246db3210b/nevuwawugorotaxuxaguxope.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_a5fa9e48f18042dbb22e13515104f58e.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_0dd2707265964b258cd8b5e59ec63622.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/aashiqui_2_song_ringtone_instrumental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738f0f60-9216-47ac-83a3-c0d702cc2864/what_dies_the_bible_say_about_a_womans_role.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_d33f1539ea954a0daf6f58776053b520.pdf?index=trueIn PDF document text
    • http://juxudawalugevop.epizy.com/online_chess_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/xofozujobemeletokaw.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_495d2241ae77411d9b31e29b705cd209.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 5340 bytes
SHA-256: 377577680c28554802792f1eac4e47f65b1f060a917998ff52b9229af9ed2925
font_01_sfnt_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 13492 bytes
SHA-256: 43b66a950358370848d3b34efc4871386eb45f4665ed73698424714894779ec7