Malicious PDF — malware analysis report

Static analysis result for SHA-256 01222ed002d327a0…

MALICIOUS

PDF

92.7 KB Created: 2021-07-06 22:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f5fd6cc6c20c0d16383db7480947a8d SHA-1: 6aa6094d306e649de7d1fc30520cd41d4be76fc7 SHA-256: 01222ed002d327a019b6ee76950ad7ad1854a3f4048a7ba6799ab327dae491ec
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of URLs pointing to compromised websites and disposable domains. These URLs likely serve as a link farm to redirect users to malicious content or downloads, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=gta+4+android+official PDF link annotation
    • http://wjvanderheidedienstverlening.nl/uploads/file/13682275620.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/2763404729.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/24175476718.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b410eb074ad---18933664243.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/34921970467.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/baac1a6f7e6fff9ce5a3c810928f0eab/nexezosujunokovojidikokij.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16087c47320188---vovamidituwivij.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a42067dfe1---rujuwutunekawijog.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608248465ec47---wenotifofuradezukoz.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4ff097ad24701e4f25e473b0cecf5e8a/mulumi.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0421d2ba16---83258088738.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1622506257.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087290916fd6---65382637022.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9cc8ccc95---22087149621.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/7p8bsra1h5uhn1tkenvlirdalr/nasipuzifegezemovaziluzot.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/b7ruoammt7035rg1osf0518uf4/65918377427.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/80374122966.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/58591940959.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d54217956e---molipanolomexapezaton.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/37874964143.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/54101605964.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210706052701.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a09ce38e---divipisazavupezaxi.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/27099574916.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ac7637b21---85565658302.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_off00010888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001209f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209F 10288 bytes
SHA-256: b4fa25b87411d29cf3366e913d30bfb886dbc5136caf1238481129b78cb48db5
font_02_sfnt_off000137e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E5 17524 bytes
SHA-256: af9f3ffd04408cba6479afdd81cb3c2d1a282f7a74f3021bd61bf9f70848cd04

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