Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b206dbed516111…

MALICIOUS

PDF

71.2 KB Created: 2021-10-11 05:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f229177fec549e2440dc1994bd7839a5 SHA-1: 255e7c6762a56732d6a11c40cb99ec5936f0de3f SHA-256: d2b206dbed51611157215216a2ebbb35d476acf79b6aa473f60f09b87c4b23f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://coretry.ru/uplcv?utm_term=the+meadows+nottingham PDF link annotation
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/19872540079.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/72986283601.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/rewirazopip.pdfIn PDF document text
    • http://apismorava.eu/docs/fexagowuvenedojorixido.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/52683344586.pdfIn PDF document text
    • https://magerp.org/upload/files/pipexabirenarezixudisa.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/kajibotaraf.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a10b65aaa4---wiludeledijani.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d16aeaca85---3507826777.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/23457326545.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/37602400128.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/kiwusinelimeraf.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/libumigepeloguvo.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5215ca711---tipubixarasepitixuwa.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/561f02ae0b7ae5b069734ca144dd06ab/kunobijesasobofe.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/4227651390.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/zoxamuzoninubiwud.pdfIn PDF document text
    • http://wawa757.com/uploads/files/junatututaki.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/beruzububajazewujabe.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615c7de9906c4---72938137534.pdfIn PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20211007_091333.pdfIn PDF document text
    • http://land89.com/ckupload/files/zuzipemam.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/23743139493.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161457367e98ac---97719096763.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_off0000b6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D3 15936 bytes
SHA-256: 830158a560b2eee716c84e2c8b895f38973e139dccdee113d2be77b312b470cc
font_01_sfnt_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 10596 bytes
SHA-256: 64b60c0d715ecc9803085c7c3ee22b20a7978166d558a22fc620d383a7a76aa2
font_02_sfnt_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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