Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60cc6ef543cccf5…

MALICIOUS

PDF

85.1 KB Created: 2021-08-25 11:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0f0bbab589256efcc4b44881d7714795 SHA-1: d49ecf13b2c278372f703de5b287cd21515572ca SHA-256: c60cc6ef543cccf584228ebc56afdc284807a6a7923771be23fb3069b774fd67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://chickenwild.com/upload/contents/images/images/26026423682.pdf In PDF document text
    • https://sukaunited4d.vip/contents//files/gopipupijutefixixegilal.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d23c2a0b79e---xozamuferozigizimigofoko.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090f4270ec33---lenugawesok.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e4a730e96---doxudokexupexidufabepozi.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/26177734023.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/31492423582.pdfIn PDF document text
    • http://firegallery.ru/img/upload/68738740399.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d39309e70ee---sajagopaberivevomanevegiz.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/japifunobib.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827b8f7e0d3---91793731980.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16102c27a63577---23546113350.pdfIn PDF document text
    • https://epiphanych.com/images/file/27052385873.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/60363157456.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/28136389334.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/zimuravugu.pdfIn PDF document text
    • http://corporacionnoa.com/UserFiles/file/45952790819.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/97931941791.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/39b9c75a53f0dfc5cc017e1f191feb2d/22450881004.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/36560274587.pdfIn PDF document text
    • http://servmed.net/userfiles/file/vumuroxazavasof.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/84230869550.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/1169218429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=five+nights+at+anime+jumpscaresPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0F 18380 bytes
SHA-256: 59b570194b42eb2ddd9d019d2fe32bc297b6b0d27fbf64db73943cadeafc33f4
font_01_sfnt_off0000fcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DB 10928 bytes
SHA-256: ad55406ced5213fd0468443ed29c668bb1c64d8f382568d2d30d6b91a3268e16
font_03_sfnt_off00012df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF0 16252 bytes
SHA-256: 3379bc8e62b5976e0e34ddeea0ae19ee82e957bcab1b551698091f03fd59df08

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