Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f27b7f2838deb2d…

MALICIOUS

PDF

76.0 KB Created: 2021-03-21 23:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8aff56482a2ac6a19fcdc5c4c41fe52 SHA-1: e0834deb21820f5d20bde959b61998945322d32a SHA-256: 0f27b7f2838deb2d8a06ca740a75c4f75e9ac1208c05e2448da568e2b6f155ca
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'https://mezovuduw.ru/wix?keyword=super+smash+bros+n64+mods', suggesting a phishing or scam attempt. ClamAV also detected it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The document body, though heavily obfuscated, contains text related to search keywords, reinforcing the lure. No scripts were extracted, but the overall structure and URL indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=super+smash+bros+n64+mods
    • https://puxikatekeji.weebly.com/uploads/1/3/2/6/132681322/7c30348ead49389.pdf
    • http://wibebilija.22web.org/xidejuvarexo.pdf
    • http://lnstagram-blue-badge-form.com/sofenejokivaf6jxv.pdf
    • https://juvipafas.weebly.com/uploads/1/3/4/5/134583250/gixewotodoto.pdf
    • https://tubomomumaxef.weebly.com/uploads/1/3/4/5/134508744/9154135.pdf
    • http://govugododuwo.iblogger.org/anatomie_des_organes_gnitaux_de_la_femme.pdf
    • http://getfreecreditreport.info/99348455403kp3xh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a4232b19-2391-4cd2-9cda-9d000eb710b1/ms_project_training_course_online.pdf
    • http://nixikivike.epizy.com/gowevinuxunuwi.pdf
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_4a767d920ab442b2b2b9260dbd365f6b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2d1d82a0-458b-4f25-9352-82aa89afa878/grade_1_english_workbook_sri_lanka.pdf
    • https://uploads.strikinglycdn.com/files/767fad4a-0196-4708-9452-38f1edf01a2e/financial_modelling_in_excel_online_course.pdf
    • https://uploads.strikinglycdn.com/files/b22489cf-0779-4be6-8e22-7aef6bbc258e/human_development_a_cultural_approach_3rd_edition_access_code.pdf
    • http://sewegex.epizy.com/tilodiv.pdf
    • https://uploads.strikinglycdn.com/files/5bcc6b5b-e86a-427f-85ba-0d90ed0412d0/parrot_in_the_oven_mi_vida_chapter_1_summary.pdf
    • https://uploads.strikinglycdn.com/files/c81b1327-ea10-4c52-a6dd-3755b45ba194/tarot_card_online_purchase.pdf
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_b09ae47b11f541e38cae390df641cf9c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/da7faeea-a56e-4f32-a39f-f047a409a3c3/37180002076.pdf
    • https://uploads.strikinglycdn.com/files/8e51e89b-7cb9-4731-a96a-46d504c6a116/nuvevodi.pdf
    • http://sitesiku.rf.gd/lotumejavetokoxojosiko.pdf
    • https://uploads.strikinglycdn.com/files/87b49707-3948-40ff-8f97-78452b755eff/89251782036.pdf
    • https://uploads.strikinglycdn.com/files/7ac354e3-3088-4446-bd0e-3189397e0633/gallup_first_break_all_the_rules.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb26.bin
9a56f1db6820c648a1bcddb27526ebce6cbeaa0fef3f9ead8c550020d1f1ae1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB26 5652 bytes
font_01_sfnt_off0000fe2a.bin
c41d91c7e487b74b44cb3ff9dd000faf96b60e75748884a5571741cacf3c99b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 10720 bytes

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