Malicious PDF — malware analysis report

Static analysis result for SHA-256 09dbbb707a605931…

MALICIOUS

PDF

81.4 KB Created: 2021-09-08 11:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f5ce6a15d451494e6ddf14e3ea4ef391 SHA-1: 7cbd1f618c02a3880391aa39899d821b57cdee7d SHA-256: 09dbbb707a605931b41a06ccfdd5e6ef2e4c2c2527a56cd29332a25d08859a25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous heuristics point to the PDF being a link farm, with many URLs hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://queure.ru/uplcv?utm_term=proyecto+de+paneles+solares+fotovoltaicos+pdf PDF link annotation
    • http://www.vikingmaterials.com/img/54542844228.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/desiwejiribip.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/mitovagarexobibepose.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/bepegod.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/vixetekovu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c28317a70---tolavezasuwejotapelaraki.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2531578df2---24812373323.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/sodavekuguzegusorefirotij.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e80ad3a1a---80626846283.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/31b203e49672fa3c741e6b90c835281a/70253440021.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/d3cp8eb2qc7866qj18m4o35983/sijefufexibepuweziku.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/68932550419.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/giviguvarareg.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/36972819746.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/52cad15e6d832605648b172b85b0e173/zuwedero.pdfIn PDF document text
    • http://qca.ch/userfiles/file/tinuwiberusexefesujemufo.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/ziwikodinadufojatef.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160af52f87eb2f---vatugewaxamugu.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161130ab584246---fidesupapalex.pdfIn PDF document text
    • https://digireg.org/upload/wufek.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/9a579a91a57792de57b22654d61d6067/83503795485.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050221553673499.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_off0000d878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD878 18252 bytes
SHA-256: 485b717f8858db3bf36bb085e936ec3519a0ded9fdfde238b1ececd7cfe53db6
font_01_sfnt_off000106c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C8 10796 bytes
SHA-256: 7c8bb647db21073c8ade48b408bfad6996d701f1c9c2f73ce145b4963fab807d
font_02_sfnt_off00011fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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