Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e9735a92a6819c…

MALICIOUS

PDF

81.1 KB Created: 2021-03-15 21:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f551a520cc0d14a3406962e598219d66 SHA-1: 545edc93e1ec39463274e9fa14b1715c1598db20 SHA-256: 67e9735a92a6819cb695dcd076fee45906657890703007f0384de507c6010b2b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'SE_MFA_LURE' suggests the document may be designed to harvest credentials or session tokens by mimicking multi-factor authentication prompts. While no scripts were directly extracted, the presence of embedded PDF objects and external links indicates a potential for exploitation, possibly leveraging PDF vulnerabilities to execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://golowaki.ru/123?utm_term=adverbs+worksheets+for+grade+7+with+answers
    • http://xagugudel.sportsontheweb.net/savozefu.pdf
    • https://cdn.sqhk.co/boxewemutox/4ihbjh2/free_recharge_mobile_coupon_code.pdf
    • https://cdn.sqhk.co/guzelatolina/Sia9ijA/wiruteledefalonububa.pdf
    • https://cdn.sqhk.co/lagidexetin/Ctjh0hb/golden_dragon_hamilton_prices.pdf
    • https://cdn.sqhk.co/jivonaxadu/DZfiiIU/gusoximifabe.pdf
    • https://cdn.sqhk.co/rozopebak/HEjjjgc/evowars_io_mod_menu_apk.pdf
    • https://cdn.sqhk.co/noxivudeva/dfTTjfq/snake_eater_timeline.pdf
    • https://cdn.sqhk.co/kubepugemaki/djaihgj/stress_management_skills.pdf
    • http://bibuzikufaje.mygamesonline.org/13125393151.pdf
    • https://cdn.sqhk.co/nivabetaz/u3RgfRE/balanceamento_de_equaes_por_oxirreduo.pdf
    • https://cdn.sqhk.co/pegiridireva/hg8SfUa/qr_barcode_scanner_apk_free.pdf
    • https://cdn.sqhk.co/fojevimexu/ggXhtht/25921213710.pdf
    • https://cdn.sqhk.co/tumosirewuw/0riaMjf/impostor_academy_match_merge.pdf
    • https://cdn.sqhk.co/konajera/hrihYjg/small_vegetable_chopper_manual.pdf
    • http://rugegav.mywebcommunity.org/fijatawititakedetuvufamin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_cd5a1cc55bf5448b8b2fc12315c2deac.pdf?index=true
    • http://begujewirefe.myartsonline.com/arduino_nano_v3_pinout.pdf
    • https://d6a293f2-6876-493d-91b7-c13182b05023.filesusr.com/ugd/bcaa7e_c36823cbc12d428dab49ced238df8d01.pdf?index=true
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_5c5ef4bfe6f4432288fd61c14fafb81b.pdf?index=true
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_815a9eb3b8c648edabda3065c404cb7f.pdf?index=true
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_406e859f746e40cc85366142d049244e.pdf?index=true
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_02a6348c9cf649f0ba3f84a580da37cf.pdf?index=true
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_99de6c7847bf41ef826dea7e2fd135e4.pdf?index=true
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_26092377a0b74c4299d0eccb2e70e7b9.pdf?index=true
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_d7d47f88a671491a9e8a98758e0be3e9.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdeb.bin
4732ecaabb36dc933c5065802c27093408c02611e8d292e10014f9cd52db4dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 5564 bytes
font_01_sfnt_off000110f3.bin
16e8d51b6832fde03da6a15c3a7419cd1a3c74ee1402158679898f6f43de0ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F3 11580 bytes

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