Malicious PDF — malware analysis report

Static analysis result for SHA-256 40abb33bc1e52fc5…

MALICIOUS

PDF

67.0 KB Created: 2021-02-17 00:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 908e2e3b95d9342c71f5ff77444676a4 SHA-1: ada6c1f0f5714eae1dc19ceb5dc0b9b44a793e61 SHA-256: 40abb33bc1e52fc54a904132deb167267d62b3d13aca14464d8416196f066602
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=earn+to+die+super+wheel+3 In PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/6231677.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/zidlKji/wyze_camera_v2_black.pdfIn PDF document text
    • http://nexefugo.iblogger.org/75621613277.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/iahjqhj/how_to_adopt_a_healthy_lifestyle_essay.pdfIn PDF document text
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/3552326.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/tegikuxalukopelabake.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/haVGhgr/59038049439.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/gjaCneP/jisax.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/egiogf7/superkids_online_fun_parent_portal.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/3662047.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/qg4viia/rubakimakulipinewida.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/lorifumofelu/point_slope_form_equation_finder.pdfIn PDF document text
    • http://fijijap.rf.gd/teoria_aprendizaje_social.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/vinudezifoj.pdfIn PDF document text
    • http://resimibesogew.rf.gd/similar_figures_worksheet_geometry.pdfIn PDF document text
    • http://luviwozota.rf.gd/88293945881.pdfIn PDF document text
    • http://pakekaririwofas.rf.gd/lozoli.pdfIn PDF document text
    • http://xugibomexepef.rf.gd/transformers_optimus_prime.pdfIn PDF document text
    • http://zuronixo.rf.gd/minimalist_leather_wallet_template.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_off0000c934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC934 5260 bytes
SHA-256: 2d4bb4ab0193aba10fd3777f5ffcb14d3a446fe7f6886a468983370dee19669d
font_01_sfnt_off0000db2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2A 10552 bytes
SHA-256: b0677f39bea036b6014cdff5813bc716b9eb38fad1bda17aeb45169fee09915a

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