Malicious PDF — malware analysis report

Static analysis result for SHA-256 e564ceea81ee2791…

MALICIOUS

PDF

83.2 KB Created: 2021-03-20 11:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46e65690dcd3e389d9527a411b04b9cb SHA-1: 22fc1f32f58f0bcba5280715a4c8277e2fe42d39 SHA-256: e564ceea81ee27918abd176282d792110c6e1a9cb146c330f67af1fa1c45988e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'midufefew.ru' which is likely part of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan. The embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/wix?keyword=viper+791xv+manual+espa%25C3%25B1ol
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/fazog.pdf
    • http://pay-order.info/dowelofubixejagaliylb2.pdf
    • https://cdn.sqhk.co/jevipugirofi/hhfYhfI/wow_cataclysm_addons_4._3._4.pdf
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/3518925.pdf
    • https://duzejuwilana.weebly.com/uploads/1/3/4/8/134879611/724523.pdf
    • https://cdn.sqhk.co/xufojidaju/YJXYibA/2_player_race_car_games_ps4.pdf
    • http://lenudes.com/nexuzezomosajulubupagekole8l9.pdf
    • http://phulop.store/23449372833r418u.pdf
    • https://cdn.sqhk.co/taxodisilif/idhfibW/weeds_cast_stevie_season_8.pdf
    • https://lilususuki.weebly.com/uploads/1/3/4/3/134317990/7fa02ae3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fotepopunaj/bratislava_letisko_informacie.pdf
    • https://s3.amazonaws.com/sisaxu/tegotesetegul.pdf
    • https://s3.amazonaws.com/bupijila/79316546860.pdf
    • https://s3.amazonaws.com/wukara/coconut_dehusking_machine_project_report.pdf
    • https://s3.amazonaws.com/zuxime/73255824852.pdf
    • https://s3.amazonaws.com/kesumasaka/72379575552.pdf
    • https://s3.amazonaws.com/fedojigudaj/tejemojurenirunipovok.pdf
    • https://s3.amazonaws.com/pojikovewijeja/what_was_the_average_cost_of_living_increase_in_2018.pdf
    • https://s3.amazonaws.com/bezutu/beastmen_warhammer_guide.pdf
    • https://s3.amazonaws.com/wavunot/xikonepagimisizekegutowi.pdf
    • https://s3.amazonaws.com/tawovojo/mikipofepisagojutusowe.pdf
    • https://s3.amazonaws.com/takurugilij/zeremipivetemepofusoxemen.pdf
    • https://s3.amazonaws.com/sixenogafopoj/writing_a_bibliography_apa_format_with_websites.pdf
    • https://s3.amazonaws.com/senodiw/demonstrative_pronouns_worksheet_for_grade_4.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc9.bin
72e4183861bbfb0ded1ada878e65b50c56803b31d75ed64fc8d93a8d32cfc041		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 5560 bytes
font_01_sfnt_off0000ff70.bin
c65221b3d913bbdaad07403953bf0a9d1f415b50a9c263e8c96b0846298dd1e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 12476 bytes
font_02_sfnt_off000127ea.bin
927edb37ba29c306bc58e33022e4c42970f0febddc6c4290972027162a75fb52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127EA 16272 bytes

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