Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec5c9fd7f10c293…

MALICIOUS

PDF

89.5 KB Created: 2021-03-01 18:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 235209ee8c8c514387ef465e497e0c32 SHA-1: 39cd5f21ad71ad9139f6186254e415d092a2ed53 SHA-256: 9ec5c9fd7f10c2936a01103e232a78e3501086d8bd19caab276d916df6748594
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful websites.

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://maypoin.ru/wix?keyword=order+of+sharps+and+flats+worksheet PDF link annotation
    • https://cdn.sqhk.co/tibakekavero/hjclxrH/501_free_new_escape_games_2_level_6.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/ghfdMge/download_game_indy_500_arcade_racing_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/NhajVNh/off_the_rails_3d_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/rinulazopun/ieheFJt/10144927046.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/jdCfLgf/bertram_fiddle_episode_1_losung.pdfIn PDF document text
    • https://nodemudikukurev.weebly.com/uploads/1/3/5/3/135348567/jamiwuli_vedoz_waxemaji.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/8235751.pdfIn PDF document text
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/zexotetidariru.pdfIn PDF document text
    • https://cdn.sqhk.co/lomotutuwe/iKZgcge/sazekisogupudalokel.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/hgc5jj6/wuvofefafirurebavolekirob.pdfIn PDF document text
    • http://dektesheff.xyz/automated_logic_webctrl_v6_manual6h3tt.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/jjjfieV/69898506867.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/suxiweke/77771830739.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/form_bharne_ka_tarika.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off00010cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD2 5312 bytes
SHA-256: d7b070c786557388716200157745c25876d465369e1fb2937ccb07cf6953a577
font_02_sfnt_off00011ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF2 10536 bytes
SHA-256: f0df2faf1a7f05d7c0424d6f04fb14b0dfa0014e4ebb2c1a6b2c20329c53064c
font_03_sfnt_off00014337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14337 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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