Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3389176f4daadb4…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 00:30:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d6517cf778c3d0c7198b5a5527e2026d SHA-1: 3ee7c4152b369545e706f03e90128d52e8f9c4b2 SHA-256: c3389176f4daadb47457925af6ebff064416950dad58195eddd852dfbc7b9f1a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a lure for 'best home security camera system 2020'. This URL redirects to a link farm on disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=best+home+security+camera+system+2020 PDF link annotation
    • http://armlur.space/77307942588erc0s.pdfIn PDF document text
    • https://cdn.sqhk.co/popuzanuguw/jjhghhj/ragumodile.pdfIn PDF document text
    • http://mists.space/converter_ico_pra_jpgtxpdx.pdfIn PDF document text
    • https://modizotu.weebly.com/uploads/1/3/2/7/132740501/ruwavawapudise.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/7iaMCje/happy_birthday_in_spanish_mariachi.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/xibeji.pdfIn PDF document text
    • http://evatopshop.xyz/sifetizusuxupifumogelptw.pdfIn PDF document text
    • https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/1714319.pdfIn PDF document text
    • http://verifybadgehelp.com/6995122790bqfvz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://koburolamugalo.rf.gd/documentation_of_project_template.pdfIn PDF document text
    • http://sedobuxekazadi.rf.gd/pulalorivojufix.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/coreldraw_x7_keygen_rar.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/29149474146.pdfIn PDF document text
    • http://xosofidevutora.epizy.com/free_lagu_armand_maulana_terluka.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF27 5208 bytes
SHA-256: 2fd7f51e237b781ca514e5b588c55260e762202693dfb891f8b5aebc933e82d8
font_01_sfnt_off0000e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 10224 bytes
SHA-256: e9e65066528dcd794c5165cea0667d563187a51ece2e4c6f304febccdfbd01a4
font_02_sfnt_off000103d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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