Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f897c3c32bb72b…

MALICIOUS

PDF

84.8 KB Created: 2021-09-15 09:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: becc03889166fa78acb7e45ead0645e7 SHA-1: b48b1bde412958eab70d48af9baf5a57d813eced SHA-256: 14f897c3c32bb72bcbd2e78759d6d72df78f32a2a33a0a4be5a78632e3403863
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various PDF files hosted on different domains, some of which appear to be compromised CMS uploads. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, potentially for downloading unwanted software or engaging in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://ecoaga.com/documentos/file/fewolikereruwus.pdf In PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/15684690373.pdfIn PDF document text
    • http://iknow.pl/files/file/13982177624.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/5935332726.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/pirag.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/januwa.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132c0215e4de---felatelixixed.pdfIn PDF document text
    • http://apex-architect.ru/images/file/56689703513.pdfIn PDF document text
    • http://sciattella.net/images/file/53916304247.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/xinedavutapolonuxone.pdfIn PDF document text
    • http://osayit.com/images/file/23793816977.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/89643446842.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/kipamovuxixelemugufixibuw.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/47834596935.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/31191782029.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136c1a1a83dd---zilubiforazumapisoda.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/72616574994.pdfIn PDF document text
    • http://mobilenmr.com/files/files/9437560033.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/27800645729.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/81471942037.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/87245394869.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/45953462297.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/vudetofel.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210911062446.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/20772132875.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/24992559149.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614119a715d94---37516594514.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=download+game+scarfall+offlinePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 10808 bytes
SHA-256: c078983eb0a143dd056bd59142a6a1e796831ceee56f2d65b9c3ab57109c4022
font_01_sfnt_off0000feec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEC 17884 bytes
SHA-256: d3941413876cab0712f8139354c3d6b837a7394b559128d2055b5ac5b6b760d5
font_02_sfnt_off00012d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1