Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc12ddba5059510…

MALICIOUS

PDF

78.8 KB Created: 2021-09-20 12:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fdf52f4374952edffeda4d3d15afaa07 SHA-1: d37ba781a345f16767679d910203bcbfe2a97229 SHA-256: bcc12ddba50595106855731706f02732103619828a1c5d2031818d290db43afe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4b7df1ec4028ae452bcfe04ef7a51be4/bilexudarudibudolusukuk.pdf In PDF document text
    • https://adesso-moosburg.de/images/file/kugavikikavukodup.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614289297cd77---46593113300.pdfIn PDF document text
    • https://datajournonepal.org/files/xewemuwozomoxunawip.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16147c008db53b---21849676000.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/88640503093.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/57315737917.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/37493482337.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/puxoxevi.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341da8d4117---xonujazuxovi.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/67754585091.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/84401179137.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/fuvawodinit.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/nalatafebilakalalati.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210906_111711.pdfIn PDF document text
    • http://wmsone.com/eimages/file/xugodotavak.pdfIn PDF document text
    • http://mindennapi.hu/upload/file/mewopexax.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/11517926165.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/65994240713.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/vinujekenakapowo.pdfIn PDF document text
    • http://aalzkj.love-mrt.com/upload/files/kizuvuvewebijiz.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/8721186756.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/51001758173.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/foladamakukevidapepo.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/vosiwoweze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=schaum%27s+outline+of+engineering+mechanics+dynamics+pdf+free+downloadPDF 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_off0000ca88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA88 11476 bytes
SHA-256: 604f66e3d21ddf46a8f9c85aafea127d68e243daad5f167b99475079af56bb86
font_01_sfnt_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 18088 bytes
SHA-256: ef5f71784a9e5b81b288470962138dd7bd383f8601a7f27e6e432a48420317cb
font_02_sfnt_off000114a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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