Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce33194822c28cd…

MALICIOUS

PDF

72.9 KB Created: 2021-03-17 03:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2c5e4c02952a5dea4f3f29eea490ce06 SHA-1: 5e37e43a1f5313162df0a89366e6cf1fa37c9445 SHA-256: 7ce33194822c28cd8dd9769adc239bee881a9e2ccb0368f3cc017e63b1719849
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 are SEO-optimized, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://soxebez.ru/wix?keyword=trickster+online+wind+earth+sheep+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464053/normal_5fd6460bda73a.pdfIn PDF document text
    • http://reduslim-ordina.site/jufabudefanavosilalesazajfrcd.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/c8Rieha/bridge_strike_arcade_shooter_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_602f1e8f85c8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_6046646663dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_6028907df02e2.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/jh320hh/nosamanopazolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_600ac8464873a.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/ielqgdj/italy_music_online.pdfIn PDF document text
    • http://my-favshoph.online/best_romance_of_the_three_kingdoms_game_pcv56e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wetevali/personal_carry_on_bag_size_spirit.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/kdigo_aki_guidelines.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_1a92c8f0d0cd4fb280cc3bc38dedeba9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujapomib/fasavimegedax.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/lock_screen_wallpaper_android_6.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/zebifenobowuruvuvijagazi.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/86078828612.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/arm_template_for_azure_vm.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/lmms_tutorial_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/chitrali_audio_songs.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_92c0f169c210408a8cecb0a556dd4306.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_off0000dba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA7 5440 bytes
SHA-256: 15969380b2d1b76ecbb2cd4e1743a973735c300b8ed09f217128e10a0215b378
font_01_sfnt_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 12584 bytes
SHA-256: b0e3dd38605912b0952404807dce9ce8112530e9ee6be2ab374666a4f6e95dff

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