Malicious PDF — malware analysis report

Static analysis result for SHA-256 9744b1554a7e26df…

MALICIOUS

PDF

75.4 KB Created: 2021-02-17 19:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6dc6062be6576a347bea12af0a4c3b9 SHA-1: 33f67e158bfd45924b66fc025471e78d26792040 SHA-256: 9744b1554a7e26df7a9d57f6d09e05f41db2c99441cc9722a2c7effe556ae876
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=st+john+and+st+mary+chappaqua PDF link annotation
    • https://matigolexa.weebly.com/uploads/1/3/2/6/132682665/621ff212244.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/j2sjajj/assistant_manager_resume_description.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/jhngePs/kepevetiwevasonujadoseba.pdfIn PDF document text
    • http://rotugozebowovu.iblogger.org/directors_report_format_under_companies_act_2013.pdfIn PDF document text
    • http://xajotupefaku.22web.org/jelaxiwevexetebonanamuge.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/ff971f35014812a.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/e372a9f.pdfIn PDF document text
    • https://cdn.sqhk.co/gagufatemo/jbGjihi/dosisaserubapimi.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/VhaOjix/star_wars_space_lego_sets.pdfIn PDF document text
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/fajuxufiwuru-bidipudamuzebi-bifokasijivosi-wekitosiribawu.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/hcjchii/jazz_super_duper_offer_monthly_1000.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/jfgehjJ/george_strait_song_lyrics_pure_country.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/miwolezedubujoz/55909391000.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/mah_b._ed_cet_2019_hall_ticket.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/33920909193.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/salesforce_certified_platform_developer_i_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/tosamoxobagafilixisomel.pdfIn PDF document text
    • http://wamivofubamaxit.epizy.com/encyclopedia_britannica_apk.pdfIn PDF document text
    • http://mibofive.epizy.com/best_emulator_for_android_app_development.pdfIn PDF document text
    • http://duzivuzox.epizy.com/puturalalagezivulanur.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/nuduwenamovulanegosepet.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_off0000eb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB24 5688 bytes
SHA-256: f3b84149c34e39ab6f888c220c8b35d41848cab0492991d19fe61345f9f3bffa
font_01_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 9964 bytes
SHA-256: 9d7332b56b3b7d74cae51b8f13088b47570092bae0477e567ad55146f5fb64c8

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