Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2952f715b2bfbe…

MALICIOUS

PDF

96.5 KB Created: 2021-07-04 04:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e736d1aebde5ee9507785d609d386871 SHA-1: 8c4bf5712e6fe47c76c2660d44fd4b783184a736 SHA-256: 2b2952f715b2bfbeba08694597021229a139f7af461f196f2b84c9194f4457e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the overall structure point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://krisoc.ru/uplcv?utm_term=heat+of+the+moment+supernatural PDF link annotation
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090118551894---fivumilu.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/43413927583.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160966ec210ce8---tefurizibukagurezobawe.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///kogopos.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/23972814333.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975bba6828b---kuzaralugikisimupivabelo.pdfIn PDF document text
    • http://cba60.com/clients/6/6c/6c2dd71b6188bc8e8f5adc6209c6f86c/File/51761732234.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608223306bbdd---1574660446.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/mubuvuzejokupebiwufoni.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f836322d14---1305372897.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f68e84c77b---lilaweliruwosalezo.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ti4s701mlmt05pa1sdie2ifc08/jexebe.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/poxiju.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/34355735613.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097cd644217b---vutubuzaguso.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/26416906069.pdfIn PDF document text
    • https://ikima.fr/uploads/file/10506946968.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/86051134123.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/wofigoxirilixubegadivun.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/wowawisugalikowira.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd1945392d---fuwivokixilupumewo.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bab24ae4d50---xuxubaxazipotapig.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160923f8e678be---42143441578.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/wagunesanesafesofemazo.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/nalivemowigelijam.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/47954699775.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077abc433efa---fofusigituvikiji.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/zedajogajokedibipimize.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001175d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175D 10624 bytes
SHA-256: 5635d50567c94885ff40e80d971ed111cc6a93be36a3ba5f8a23799b2166801e
font_01_sfnt_off00012f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6F 17356 bytes
SHA-256: 4352b6cd0cdf778d98985aa4901d2b06a0f586b16567f8f0c1e972209d84d1d7
font_02_sfnt_off00015c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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