Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c120737b022269…

MALICIOUS

PDF

83.8 KB Created: 2021-01-17 12:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d3c762ee16bf174ce09633fda7f402d SHA-1: 7715e3324b1190cb7243261108bc906f2d31cfdd SHA-256: 71c120737b022269cccd2f48e014a067944a952451ad42eccb187f0f9c87c942
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'trafficel.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-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://trafficel.ru/aws?utm_term=company+website+template+github
    • https://site-1177548.mozfiles.com/files/1177548/tewokaxolupajoven.pdf
    • https://cdn.sqhk.co/dudugetogi/cerCIgf/friskies_cat_fishing_2_apk_download.pdf
    • https://site-1249530.mozfiles.com/files/1249530/cnn_uk_tv_guide.pdf
    • https://cdn.sqhk.co/vigefifobot/gghifij/mr_huie_american_ninja_warrior.pdf
    • https://site-1176821.mozfiles.com/files/1176821/41639749605.pdf
    • https://jedamebised.weebly.com/uploads/1/3/4/6/134651392/rewowo_dovefidekubiz_xagujusidis.pdf
    • https://dasasaperot.weebly.com/uploads/1/3/4/6/134665710/5aa366a894cc98.pdf
    • https://cdn.sqhk.co/nigulavax/5jgha2s/what_is_50_dollars_in_1979_worth_today.pdf
    • https://cdn.sqhk.co/xurazegoba/eYijLih/h_band_watch_app.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zumomasugipeno/learning_spanish_worksheets_with_answers.pdf
    • https://s3.amazonaws.com/fojaxexino/missguided_red_plunge_midi_dress.pdf
    • https://s3.amazonaws.com/fusidejebi/18490594888.pdf
    • https://s3.amazonaws.com/wovitiku/58206600066.pdf
    • https://s3.amazonaws.com/dovulavavo/free_applied_mathematics_books.pdf
    • https://s3.amazonaws.com/setigafat/9789816477.pdf
    • https://s3.amazonaws.com/foneniz/projeto_de_robotica_com_sucata.pdf
    • https://s3.amazonaws.com/lomuper/chaganti_koteswara_rao_pravachanam_sampoorna_ramayanam.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/49972383426.pdf
    • https://s3.amazonaws.com/gupuso/79134766379.pdf
    • https://s3.amazonaws.com/mekonulegipero/397296562.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_off00010b06.bin
858a764c0b330a3b9b6753ecf87ec86ebaa90b0950ce9d793d6257b5633be59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B06 5376 bytes
font_01_sfnt_off00011d36.bin
52a46ef4bc1779044e7d67cfb5616c16ec7f675bbccce569cc02915376d0820a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 10648 bytes

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