Malicious PDF — malware analysis report

Static analysis result for SHA-256 5803750cd8124b16…

MALICIOUS

PDF

77.0 KB Created: 2021-03-20 09:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619008e596ff27b966a6b28a6d947f09 SHA-1: 579d4396c47b30a66e53222b12800e512718d9ee SHA-256: 5803750cd8124b169138f0aad84e87f0b69f121f4d126a3aa1d5051561eb60a4
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to SEO-optimized PDF files hosted on various domains. The primary URL, 'https://ponafet.ru/strik?utm_term=what+is+the+best+temperature+for+volcano+vaporizer', suggests a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=what+is+the+best+temperature+for+volcano+vaporizer
    • http://lawusuzad.iblogger.org/97196715230.pdf
    • https://cdn.sqhk.co/tutabudoxuwa/hqhhe48/caregivers_support_group_for_dementia.pdf
    • http://mitefakosutupot.22web.org/which_bags_are_recyclable.pdf
    • https://cdn.sqhk.co/ronejudutiso/gfiehds/24513518035.pdf
    • http://fonabibexame.iblogger.org/dilajexebakokunepuva.pdf
    • https://cdn.sqhk.co/xosuridasago/anHMa5k/glow_hockey_app.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_5837560bc8d44dcfbe5f40be76f3068b.pdf?index=true
    • http://pogifovemujure.epizy.com/jotaro_s_theme_sheet_music.pdf
    • https://s3.amazonaws.com/wizuluworafid/medaruruwoburekevizadun.pdf
    • https://s3.amazonaws.com/fizufapu/why_did_my_rock_candy_not_work.pdf
    • https://s3.amazonaws.com/wuzalugiseto/46886189114.pdf
    • https://s3.amazonaws.com/widuxade/79667738809.pdf
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_1933078d2bcb4539b688d42d1a13ca39.pdf?index=true
    • http://silapopo.epizy.com/pneumatic_cylinder_catalog.pdf
    • https://s3.amazonaws.com/wazorixekunafob/baca_berita_dapat_uang_di_android.pdf
    • https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_a085ef1830794987a8e3e953aa64505b.pdf?index=true
    • http://rebukupomapet.rf.gd/asfixia_perinatal_causas.pdf
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_4845d9a27c054808a756a1f829def936.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_off0000ed2e.bin
8ec39e4893ed2338cacf1489792b599ae97af8cbc52bb38f6568b1d74937c4b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 5520 bytes
font_01_sfnt_off0000ffdf.bin
22ccb47b9d550bd70da7526f8b461894e6d34475414b10c6b938ceb1f03d4471		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 10664 bytes

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