Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1da4c705c93a96…

MALICIOUS

PDF

78.1 KB Created: 2021-03-24 02:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 428bd7c52a52e99a7e58498dfda8eac5 SHA-1: 42e669f05017b16bb3063f89f5d3378e274a9f81 SHA-256: 6c1da4c705c93a96ea20ed28a3e3efebbf5cb0428fb1a8c050ba33bf33956ff1
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://ponafet.ru/wix?keyword=2020+tax+calculator+turbotax', which is presented as a '2020 tax calculator turbotax'. This suggests a phishing or social engineering attack aiming to trick the user into clicking the link. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=2020+tax+calculator+turbotax PDF link annotation
    • https://cdn.sqhk.co/rosisole/hamjeci/us_crime_statistics_2019_by_city.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/piegghj/32695092306.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/1_rep_max_percentage_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/2ggjih6/78925246042.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/fMhjCjj/lab_escape_room_urbana_il.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/gitbqXH/9162033759.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/jdvLAaA/cataclysm_dark_days_ahead_tileset_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nivopekodi/jcjfkia/16864844026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_60214a8c62352.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/egghgfs/46862868430.pdfIn PDF document text
    • https://cdn.sqhk.co/govupasuti/gdoygie/wapking_2018_movie_song.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikijun/jjlhfXb/wugifudabulotafitor.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/dgdYGgd/orange_tree_leaves_medicinal_uses.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/ajhjtbo/free_fire_wallpaper_hd_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/hj5jiaj/tarifinojuxobabenana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fed8f7cd509c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/59563553496.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/febovewibesus.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/gifobuzixesipizubalo.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/toxivumusudedejujujuxosin.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/beluwuzikofateju.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/election_commission_of_delhi_form_8a.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_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 5000 bytes
SHA-256: 1fceb6049d7c53356a73b5f53fcd30aa13be0441cf2f5db3cae7af10685ba600
font_01_sfnt_off00010484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10484 11276 bytes
SHA-256: 91b8aeaef5a0e78cfac8053ae5957ad14b31679541a4aeee02cf84d8b43c4dad

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