Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8a566f8ec48894…

MALICIOUS

PDF

70.9 KB Created: 2021-09-19 11:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 698e11aaa4c96cebeb0b6294d3173553 SHA-1: 4493d8b419732b5a1be886530acd96518f9f72f8 SHA-256: bb8a566f8ec4889474eee8be2b49cd353826151e9791df42a23074f887e92f1e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://queure.ru/uplcv?utm_term=10th+social+science+book+tamil+medium PDF link annotation
    • http://zopos.zohukum.com/ckfinder/userfiles/files/vetasobopiti.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/joxinuzujiworumada.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/80715648851.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/96357961527.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/rabegoripimibelimig.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/molozamufajobubadux.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/pabuxivuwaton.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/wisusazeto.pdfIn PDF document text
    • http://lesrimaudieres.com/images/uploads/file/buvevarisusam.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/33539965680.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/16636151606.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141bb1e450ca---97986339686.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/51417164890.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/2646536200.pdfIn PDF document text
    • https://seerupit.dk/assens/file/labulepiw.pdfIn PDF document text
    • https://schmitz.cz/res/file/jupuzapeba.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/81968762175.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5efa3d4f4---32483862467.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/dadodode.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/30970269480.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/93636288261.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1614089ca37a2c---kajeverafijosefogupixotek.pdfIn PDF document text
    • https://preciseenergygroup.com/media/fexavewarozumixoxo.pdfIn PDF document text
    • http://ahnil.com/userData/board/file/11168286291.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/20461178508.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/tokope.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_off0000b2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B5 10944 bytes
SHA-256: 09c1cda5a5adf29b2234208f916a940bd70e27c221db776472248b89feb2a282
font_01_sfnt_off0000cbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDE 16460 bytes
SHA-256: affe10e7c2fb4d5990a7c06deb784057c5b850bcb5a4ea5f013126d02ce3cf3e
font_02_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.