Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a1ba072e91c961…

MALICIOUS

PDF

80.6 KB Created: 2021-03-25 08:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59f06e382350753c6c3596ae4adc18f0 SHA-1: d993fa1f0470754a981018677c85780488ba25a5 SHA-256: 07a1ba072e91c96124ac7cc1bebfba277ba92466a9feff2261fcc71058ea2ece
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as legitimate content, such as software product keys. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=letasoft+sound+booster+product+key+2019
    • http://tonagruz.ru/hwy_17_accident_reportfx8if.pdf
    • http://harmony-market.ru/baby_soothing_sounds8umc7.pdf
    • http://kudretbozaci.com/dx11_feature_level_10.0_download_windows_105gf7a.pdf
    • http://cpskras.website/75614787614pikr9.pdf
    • https://cdn.sqhk.co/diwiporeb/tc6YhaR/barrett_jackson_2020_schedule_connecticut.pdf
    • https://cdn.sqhk.co/fomeluxilim/izgcR7d/pixel-_adventure_art_run_pixel_games.pdf
    • http://bigpleasure.ru/reportar_alumbrado_publico_chihuahua9r4lt.pdf
    • http://bossyonlinex.com/lutuvefofuvebajifudan0jja9.pdf
    • http://devlp.design/vudedejumamadutamug6bm.pdf
    • https://static.s123-cdn-static.com/uploads/4370057/normal_600595695f3f2.pdf
    • http://accueilcmb.com/focusrite_scarlett_18i20_line_outputsiohu4.pdf
    • http://bitcoinlearningcentre.online/kenmore_progressive_upright_vacuum_belt_replacementpiozg.pdf
    • https://cdn-cms.f-static.net/uploads/4450728/normal_602e59b071061.pdf
    • http://lofitner.buzz/irregular_verb_list_in_spanishinlvz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lurutopobi/73386362991.pdf
    • https://s3.amazonaws.com/lomogas/weber_spirit_11_e-310_manual.pdf
    • https://s3.amazonaws.com/sasufufa/alimentary_pharmacology_therapeutics_author_guidelines.pdf
    • https://s3.amazonaws.com/runuzitexokol/pudufon.pdf
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_2360edd0237e4398a725aced4d1e627f.pdf?index=true
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_c4992d52782d44d1821f339b7beaf119.pdf?index=true
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_4c6ac510025a44ceb93fe93d8472c5fc.pdf?index=true
    • https://s3.amazonaws.com/vufupu/zavexokop.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_off0000fb18.bin
f7f3997787ee906716456256701f54aa2df39e8ad93a257af85cdaa4543d9e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB18 5848 bytes
font_01_sfnt_off00010f1a.bin
4e007dd5a8102188cb84a8f179238091d2c776e0ffd490a7e244500a91b277eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1A 10992 bytes

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