Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cba03053bc50d49…

MALICIOUS

PDF

143.7 KB Created: 2021-08-01 16:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f7e9c097963d76facf5e415d5e25867f SHA-1: e3232947906bd5861d28cc9440744a780b832ac1 SHA-256: 0cba03053bc50d49143241717d2b3de9ca2284d355da8d55ec71fb78817554c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised 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 distributing further malware. The presence of external URIs and link farms points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://pixomot.ru/uplcv?utm_term=where+are+the+creek+tribe+now PDF link annotation
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/vanigukijeni.pdfIn PDF document text
    • https://epiphanych.com/images/file/zujetabesijake.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/makezojinavejerinalaj.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/a36970c3deb8ae746f3a918e8459c40f/43612050427.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/simatijipobuvonu.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/vaa7sjr4oc639k825qusrm4d2h/74626286924.pdfIn PDF document text
    • http://3q1p.com/upload/file/210619165248970752h6ad1v5pbyfj.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/mezebasefiduzin.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e181c5243---43158868520.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/8e9ce6124e80d844b2f71e68e6b194c4/sopuvomaxidojowepajugozuw.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/dovovoxuzaxonurepuwozur.pdfIn PDF document text
    • https://purefeeling8.com/data/file/zoparejutijumep.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/2iji81oehomhcfg8e9rda1rh6b/52190335551.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/23941906664.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/20885d568282e3ad5c852fb3365c18d6/jizorazanobo.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/49789848059.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/7935593951.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/ujrkv2lfvteggnqcn0g974m0rg/99105598006.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/24140299351.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/xosobuximurowifubesivada.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/7262955348.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/mopakazuwumuzaranifo.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cc602dc41a7---vemexufaku.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/vitipobekumalogeziw.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cf1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E734 10424 bytes
SHA-256: 582a18650c91e589deff91a95e5f9282fa61a45fd4d8fa86a5234d931f0b8e3f
font_02_sfnt_off0001feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FEDA 18540 bytes
SHA-256: 4bb08f07f49c96e5a4065633c2aaa58b8ff41a39538d7890f437acf26012ed12

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