Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0976309a297651…

MALICIOUS

PDF

74.8 KB Created: 2021-09-15 13:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7b0f2a92ba0995670ece607a6f11a460 SHA-1: 67a00e0ff10bd67052a2de48b3f293b2d9b6f2af SHA-256: 2c0976309a29765155994b95d81b3a3d4f9fbcc2b9fd8148c9ee86136f46e3d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=kitty+pryde+x+spiderman PDF link annotation
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/19789243994.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/luledamudizedivunapawe.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/sebenimuta.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/47164598021.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614162ceae854---9253981224.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/04e7ded18a818b166c25d59d92af778a/rawutarobogetilawowabedof.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/gitejoni.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/99763754380.pdfIn PDF document text
    • http://futboltotal.net/images/files/bejuwu.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210903_2F38B410F56CB6E7.pdfIn PDF document text
    • https://abriganature.centralcms.cloud/galeria/files/69725226030.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/4114247096.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/s6n610sp9im97d9olcej8o0nm7/56099223396.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/17641404891.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/28689905248.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/23436571928.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/30464177660.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/rijotirapize.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/xijijaronefizawizobafudok.pdfIn PDF document text
    • http://rivucota.com/upload/files/16888698179.pdfIn PDF document text
    • http://actinq.nl/upload/file/95623232838.pdfIn PDF document text
    • http://stefani.cz/fck/file/beguwafegin.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321bb70855a---94303584980.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_off0000c0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD905 17108 bytes
SHA-256: ee03ef3a15481874756c5fa19c6e1063e5d72bc7d09a1e50a6de0ed743604b47
font_02_sfnt_off00010550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 10592 bytes
SHA-256: 17a70ab33fc28af94ea9d03510f764dbee666d4270b2b471b39d4a01c23353b7