Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b4593fd48624a1…

MALICIOUS

PDF

89.1 KB Created: 2021-04-05 23:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27bfef72486068c601a0ce582d4a5f2d SHA-1: 98f369037038175a138fe947633812abcd102e4f SHA-256: 63b4593fd48624a17d6a5d850482e0fc8757dc1b2aac648fb41a9ffff2fc94eb
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with the primary one being `https://seumenha.ru/strik?utm_term=what+pods+are+compatible+with+nespresso+vertuo+next`, suggesting a lure to a malicious site. The PDF structure and embedded links are indicative of a phishing campaign designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/strik?utm_term=what+pods+are+compatible+with+nespresso+vertuo+next
    • http://dutov.org/their_eyes_were_watching_god_summaryqzuab.pdf
    • https://bigubuwona.weebly.com/uploads/1/3/4/3/134309174/deboj_xoluguluragip_zikipebapazusi.pdf
    • https://cdn.sqhk.co/zenegiwowi/bpHbhUP/58586347146.pdf
    • http://libralab.digital/703625163428be5r.pdf
    • https://nimafomu.weebly.com/uploads/1/3/2/7/132710507/vixovagiruvo-megaku.pdf
    • https://cdn.sqhk.co/viwitukaz/eqib9id/number_format_php_leading_zero.pdf
    • http://salebox.shop/akhiyan_nu_goli_maar_diya_songge33c.pdf
    • http://yandex-delivery.cc/kegomubigizofepenigudidy27ae.pdf
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/zodasosanitoriz-nezapatenimeti-jexedine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kisagoz/23991786871.pdf
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_6e402b938d554f9b8f39400bd52883c9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/86735c5e-0245-4985-a728-7538f5e23a08/xuloxibolewegu.pdf
    • https://uploads.strikinglycdn.com/files/5ee76bb9-e19a-485a-a456-d5291b310e65/samsung_50_inch_curved_tv_price_in_india.pdf
    • https://s3.amazonaws.com/zopenave/english_test_papers_for_grade_5.pdf
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_ca81378b1eca457b9511f7a8df3cd334.pdf?index=true
    • https://s3.amazonaws.com/xuxifuzituwu/59336860921.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_off00011e52.bin
61a6a9bc09af4bdfdd41ae2c4ad67d2913402a82ce80b80b2c8bb82204f53316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E52 5684 bytes
font_01_sfnt_off00013198.bin
6532d1dcf2e890a28e3b41e60769f5086f989bf2da48bbe5c7b95dde7ec1ef03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13198 10992 bytes

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