Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb80d534ea234074…

MALICIOUS

PDF

81.0 KB Created: 2021-09-19 02:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a5d4e96aa566e8ededf9d92029f3697d SHA-1: 1e4669a4f80c0ba8b655892543694ab84e0b5b61 SHA-256: eb80d534ea234074cbdc112f004a57b47277da08f6b80b97985eaf011897b9fe
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm and a potential phishing document. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and unreadable, but the presence of numerous external links, including those hosted on compromised CMS platforms, suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://asiantms.com/ckfinder/userfiles/files/givibuxebonesezexomufabu.pdf In PDF document text
    • http://czerwoneiczarne.pl/files/file/58807981173.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109012321329682.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/33437388420.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caf1aee656---xisanuwezesugikaduxudeta.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/66171636148.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/surulefilovososus.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/mazani.pdfIn PDF document text
    • http://i-dron.cz/data/file/29548768358.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f610430fb9---kilavipokunawuk.pdfIn PDF document text
    • http://ibb-online.ru/f/file/28145719677.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/84712284844.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161466c08d46be---1323007003.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/rotexi.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210905_213753.pdfIn PDF document text
    • http://synphabase.ch/upload/file/46984255425.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/845c94d4df5fff5ac500ce60a2e2b82a/pefopomopurilixive.pdfIn PDF document text
    • http://tlca.com/Content/uploads/files/93649089743.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/suluxukinuvategasoje.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/zuzawet.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/kageruwekaxex.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/mewaposodogivanelif.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/51684287799.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/kazip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=s6+edge+disassemblyPDF 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_off0000d743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD743 10668 bytes
SHA-256: e03762c55ef928b82195ba88e1a303a64ded0f2fbec9a25fc121e8ae18d5c891
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 18232 bytes
SHA-256: 5d060450a7619b879c52ba930de1e21f7400d1d4c1c7f1bca9287a90c9d4143e
font_02_sfnt_off00011ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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