Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af1f82e064ee3e3…

MALICIOUS

PDF

85.2 KB Created: 2021-03-17 13:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b7b3f43bb358e63c62ef6cdc345c739 SHA-1: e46c068cba0d5396ff12f8105025d14004a9d6be SHA-256: 1af1f82e064ee3e3a4d7ff21e2c5c603e234412a5eccd27f5765b943c07223da
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a case study, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/award?keyword=the+fall+of+enron+case+study+pdf
    • http://ig-soft-team.com/bijalevofaxelunopodilojos9thc8.pdf
    • http://7lessons.fun/hp_probook_6555b_service_manualu9k4p.pdf
    • http://givotovujoded.22web.org/adalat_bula.pdf
    • http://pressit.fun/xivefitapmr5oe.pdf
    • http://tugeraz.22web.org/sulurofenudef.pdf
    • http://scriptbook.xyz/93375066288vx0gf.pdf
    • http://xotizel.iblogger.org/65138122299.pdf
    • http://help-bluebadgecustomer.com/31715751518bn35r.pdf
    • http://cashthe.ru/cisco_ccna_exam_cost_in_indiazeg5z.pdf
    • http://jitokinut.iblogger.org/tabojadoz.pdf
    • http://dwatches.site/dimafozosomofubexivitewgcyru.pdf
    • http://kemytbok.xyz/football_coach_shirt_controversyetq4y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sajidot.epizy.com/starbucks_almond_milk_frappuccino_nutrition_facts.pdf
    • http://gesumorazawetum.rf.gd/zixofipus.pdf
    • http://pedorusare.epizy.com/xewagubidonozezofiboz.pdf
    • https://s3.amazonaws.com/divexikav/foxolagidapodov.pdf
    • http://povasapodojika.epizy.com/chevy_equinox_2017_manual.pdf
    • https://s3.amazonaws.com/gozifep/como_transformar_de_hp_a_watts.pdf
    • https://s3.amazonaws.com/xalexojaxipud/definicion_de_ontologia_en_filosofia.pdf
    • http://gowejolu.rf.gd/formalits_suite_cession_fonds_de_commerce.pdf
    • http://niniraxezu.rf.gd/how_to_become_caregiver.pdf
    • http://gasadilipebafup.rf.gd/subaru_h6_oil_capacity.pdf
    • https://s3.amazonaws.com/timeziso/21642460883.pdf
    • http://xewewiwuxadul.rf.gd/35737693423.pdf
    • https://s3.amazonaws.com/rebomedug/aadhar_card_online_print_out.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001029f.bin
063e9c3e3d8dbe6e1dc73c3850678c244b093a991e9106e9dd187f44a6fbb2ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 5128 bytes
font_01_sfnt_off0001140d.bin
de17eb5522d4106d0ed75c73c53822f5b64113b95fa0dfb9c8ea68dec414576d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1140D 10912 bytes
font_02_sfnt_off0001392b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1392B 4324 bytes

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