Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cd2d9e4b02e132…

MALICIOUS

PDF

77.7 KB Created: 2021-06-09 12:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5e08241600f79636797344f5147b4a92 SHA-1: 2c00a06e40bdec5c91c78d646748db96b33f43ef SHA-256: 00cd2d9e4b02e132d303b6cf72ad139afff5ff5de1f7d66828dc37bad8681ffe
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=i+am+legend+tamil+dubbed+movie+download+tamilyogi PDF link annotation
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad541290156---bomopenajuwixepal.pdfIn PDF document text
    • http://fotossc.pl/_files/file/31335418942.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/513fab33007ef4c3af3c6c8d8dc0aef5/14951376002.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/23911185343.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/84730680368.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075809f3db56---39896016004.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3dfe354c---relogadikujela.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ecf5f51e7cc0507314a1a88024c9a567/7911260232.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1475f90c5654255fc085a79b1399bdfa/651113276.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/zijilebotipimidubezulaxab.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/vujusumanevi.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/fausoo9jhs20n3inmmff9t732b/78392225736.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9939755157---fopej.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210501200330194.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/suwosolusupinalojow.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/854be002da4cfac25a9c9cf4f8c7c496/muzas.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/063fd5b41ee749de4fd5fa210e114bea/gutoredegoxezefekojeda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF365 5200 bytes
SHA-256: 3d499166565de3dac61d395d7fa9b471cff610024d95c50d8c518d2320a9e304
font_01_sfnt_off0001051e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051E 10496 bytes
SHA-256: 2158230ee392688b4b2bb353def3332f06dbb8ebb9e72fdb8830b3fded186afd