Malicious PDF — malware analysis report

Static analysis result for SHA-256 690bacccef72c35d…

MALICIOUS

PDF

111.4 KB Created: 2021-08-10 03:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ea3826c70f340d45c998aea96e091923 SHA-1: bf1b99d43429c8d30faaf1b16e96827de73c0919 SHA-256: 690bacccef72c35db2db9c9a221212133fd5ebcd8694b4676205d3f3a9486060
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. The presence of a download button lure and external URI firings suggest the document is designed to trick users into downloading malicious content, likely disguised as a game ROM based on one of the extracted URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=pok%C3%A9mon+omega+ruby+and+alpha+sapphire+rom+free+download PDF link annotation
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b21f50979eb---soxaxuzosuga.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/35713709601.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161119cb371e8b---21829304474.pdfIn PDF document text
    • http://yuha.be/_files/file/77123880311.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/88831157786.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d09554072c---lapek.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af70410e895---99051396433.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16081eec88633b---gufiso.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/dopufiroxaju.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/79868934035.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/7483522143.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4fbb53672a08bd6d7a9c6bf9fb7eccde/21387243345.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7bffd1f9c---sodajupifafoko.pdfIn PDF document text
    • http://pmteventures.com/clients/5/57/576e8e71b788aac95a268099fab76a3d/File/womopopifak.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6c5p3sl5ba97gjlb4f3jaof7v5/dokovekidodanuw.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/xaxevu.pdfIn PDF document text
    • http://stevis.cz/files/file/50192524779.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/topofeduge.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/f7d210d10e8e9891ad609877bce76101/29312903419.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/8358779310.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/vukomur.pdfIn PDF document text
    • http://universe-micro.com/upload/files/20210714_015934.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/475173201f59efbd63ad839405cedd4e/79478633485.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3bfd8e9108c777569983fec54eccd4a/beponagutoxux.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/08p8svopbb3uhrf1a5uka49h8p/wokupifagaviz.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_off000145d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D8 11532 bytes
SHA-256: cb048e94e82e09c8ae545d0733d8ccab256595b69149aab2d5198f3a5ecbf58b
font_01_sfnt_off00016054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16054 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17866 19680 bytes
SHA-256: 3c4b116ad79d8baf555d0965aa2cde83dcc9b2e8fb91919d1859a6ae2dd4c67d