Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfa7ec2186fc758…

MALICIOUS

PDF

72.2 KB Created: 2021-03-14 12:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 74c51b3de12d4886eaa7cd2d878f4a03 SHA-1: 1ab4f8dc6de61e59ec28d3294e4743981fb48410 SHA-256: bcfa7ec2186fc758c903eaabc5627fb5d181d7a4c11562310cc42a9bbfc4fd57
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.8215

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/award?keyword=spoken+english+course+syllabus+pdf PDF link annotation
    • http://kazexezawulozij.mypressonline.com/tubidag.pdfIn PDF document text
    • https://cdn.sqhk.co/josozudibud/hfdiihi/ziwowe.pdfIn PDF document text
    • http://bubuwem.iblogger.org/painting_easel_for_kids.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/how_many_military_bases_does_the_us_have_in_germany.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/hc5SMhg/20134656877.pdfIn PDF document text
    • https://cdn.sqhk.co/resesexiraf/CRgijcB/afcat_exam_2019_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/hhnI3Vm/9697442379.pdfIn PDF document text
    • http://sugalomiwuto.getenjoyment.net/caia_level_2.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/ihiLgfY/pink_hearts_emoji_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/j8hbCEU/fifuxosewekafitilub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://malejubu.myartsonline.com/libro_el_almohadn_de_plumas.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/fusel.pdfIn PDF document text
    • http://xizokenimufewom.atwebpages.com/49560905513.pdfIn PDF document text
    • http://xugejinu.rf.gd/susan_cain_quiet_book_summary.pdfIn PDF document text
    • http://kamupipoduw.rf.gd/what_is_the_text_structure_of_the_last_paragraph.pdfIn PDF document text
    • http://vivimaga.epizy.com/english_to_bangla_translation_software.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/gusopogu.pdfIn PDF document text
    • http://wugetad.myartsonline.com/how_do_i_update_my_samsung_software_on_my_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/new_odia_movie_blackmail_video_song.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 5824 bytes
SHA-256: 28d1f9c2059cd0b0062883d8e1806045e382a41224210e1d14e8a78ccada2336