Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee4470e2c0103d4…

MALICIOUS

PDF

67.7 KB Created: 2021-03-03 09:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c0c6f6cf9df2405b87d4e679da99cf35 SHA-1: b897532e20fcef4c236b28925051b10cb9fbf2a6 SHA-256: 1ee4470e2c0103d4a350d9b44f8afc0765e2d0417894b2d4ead3e6a4258050b9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'vilenefex.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to academic material, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://vilenefex.ru/123?utm_term=fundamentals+of+physics+9th+edition+by+halliday+resnick+%2526+walker PDF link annotation
    • http://gisoboxizaza.mygamesonline.org/10410444534.pdfIn PDF document text
    • http://warofonatar.iblogger.org/holding_hands_lyrics.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/54924100348.pdfIn PDF document text
    • http://olipaka.xyz/how_to_set_a_digital_armitron_watchoe88t.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/23295407097.pdfIn PDF document text
    • http://reduslim-italy.site/toy_airplane_flight_simulator_gameqv6zs.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/wizitifowubux/beratedemolodufomogiboko.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/boss_movie_full_hd_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/priest_leveling_guide_vanilla.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/travel_brochure_template_microsoft_publisher.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/56943306239.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/fly_fishing_vests_buyers_guide.pdfIn PDF document text
    • http://dowegumorugujon.epizy.com/award_template_ppt_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/cva_wolf_with_scope_mount.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/51368998645.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_off0000cb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3D 5812 bytes
SHA-256: f7c3451db4468928fe694ff5192e6ba6903dbfc8f3aaa8a2e33ef9d79eceb6e1
font_01_sfnt_off0000dede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDE 10168 bytes
SHA-256: e6999d4b00f93b215ca47ed959cd46f605dd8d548c7019e19a60515870c135aa

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