Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e693dc3ddab288…

MALICIOUS

PDF

76.1 KB Created: 2021-03-15 11:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7dac4bf4cd1cbe67f97a28c06354c093 SHA-1: 53e0a72ed2eba95c064fb7218d2c452028101c13 SHA-256: 97e693dc3ddab28851b6913419d0a857a13bf2f8d8fef959d8fb784bcde504a1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a site that appears to be a link farm for SEO purposes. ClamAV and ML classifiers indicate malicious content, specifically a phishing trojan. The embedded links suggest an attempt to redirect the user to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=classroom+observation+form+for+student+teachers PDF link annotation
    • https://cdn.sqhk.co/vujenibolo/jicjfIv/mazamunuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/hjn3paM/love_failure_songs_telugu_ringtones_download_mp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_601b53618c23c.pdfIn PDF document text
    • https://viwalamul.weebly.com/uploads/1/3/3/9/133997630/4549212.pdfIn PDF document text
    • https://cdn.sqhk.co/dakusoripujo/gc43jig/planet_earth_2_jungles_worksheet.pdfIn PDF document text
    • https://moxigowa.weebly.com/uploads/1/3/0/8/130814106/dunibeluvefos_bokinaramimikus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_600452d666065.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/jd3hgUh/plasma_live_wallpaper_iphone_7.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/3883185.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/mEDOhib/harkins_theatres_reopening_date.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/jiQ9gcw/89724886661.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/QYKgix7/18974967800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_5fdafb49951ba.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/dcXvwHQ/kosenemenoravewujoneniwot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_602d0740c19e2.pdfIn PDF document text
    • https://cdn.sqhk.co/donaxewon/g3N6J7f/adobe_premiere_free_highly_compressed.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/banula/transunion_cibil_free_report.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/areopagitica_text.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/20687245498.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/67381444091.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/binomische_formel_x_berechnen.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/burrraahh_movies_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/are_ceramic_heaters_good.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/97894428924.pdfIn 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_off0000ec8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 5368 bytes
SHA-256: bf0dfea0a4437e84d290917444f31d503d693bf52637061f2c09562fc5baff1d
font_01_sfnt_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 10532 bytes
SHA-256: 0a094de005976dc25647ef9c434ed17099f419dc991cec7747784a36a35a8e97

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