Malicious PDF — malware analysis report

Static analysis result for SHA-256 755e9f567aaef9ef…

MALICIOUS

PDF

82.8 KB Created: 2021-03-02 06:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 62276b30777f0f2fa2cf22b965696fe0 SHA-1: c9835e6924e106ec33d0c5eaeffec634b235e925 SHA-256: 755e9f567aaef9ef07713021b96abee610d60f054cc7424d2880b4a2523f9c86
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 0.9996

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://xezojetit.ru/strik?utm_term=what+to+mix+with+green+apple+crown+royal PDF link annotation
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/5600503.pdfIn PDF document text
    • https://fenanenu.weebly.com/uploads/1/3/4/2/134265689/5023375.pdfIn PDF document text
    • http://biomanix.best/olympus_om-2s_review1e53c.pdfIn PDF document text
    • http://realnoe-obshenie.online/usmle_step_1_dates_2021_redditmn2ej.pdfIn PDF document text
    • http://airned.ru/how_to_estimate_the_cost_to_build_a_housee9gk8.pdfIn PDF document text
    • http://hushseo.online/kamojezasivelevonifrr1q4.pdfIn PDF document text
    • http://0fruits.space/choice_of_kung_fu_mod3x3up.pdfIn PDF document text
    • http://vezdesami.ru/fepiwuzipz1r.pdfIn PDF document text
    • https://dijitisabotiji.weebly.com/uploads/1/3/5/3/135324222/0e019.pdfIn PDF document text
    • http://karnaval.host/how_to_teach_a_child_computer_programmingd2nna.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/2373fccafdc3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_6023f8e33a2d0.pdfIn PDF document text
    • http://zelopaqq.xyz/bus_app_androidzeyq5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481699/normal_5fec4f0bcedb6.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/anti_ragging_form_aman_movementq9g11.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/vatosolikijike/template_cv_europass_word.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/bagobabipakofagimeni.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/33371383613.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/53328653559.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/13891895279.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/73361651017.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/lanewuziru.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_off00010735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 5444 bytes
SHA-256: 79252f1dcb61ee10200d5172f7645df4e78abd4f835346abd39a803890771d15
font_01_sfnt_off000119b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B6 10480 bytes
SHA-256: 21ec2891fec12f913736ac2de1457ff9b40aead03a3dae99dd2a48c133a35e8c