Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf0618af9fa98a1…

MALICIOUS

PDF

103.3 KB Created: 2021-09-06 02:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f93af5dd70822ea27f53105cf27bb501 SHA-1: 310bbd38335d90a1f41cd632e54b5fecb9a9db78 SHA-256: bdf0618af9fa98a172a2b69ff5e0b7f99aa87ee91bcdcc4b5307ef43cdd6cfa0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to download and execute malicious payloads. Additionally, the document exhibits characteristics of a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely serving as a lure for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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.
  • 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.
  • 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://catamma.ru/uplcv?utm_term=image+processing+using+matlab+code+pdf PDF link annotation
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/b130a12f5c4a76b2cbb86caf5b9d7cdc/somobivovu.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/rukuvulet.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/2b613538f315020e51b13190862ba964/61584978845.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/er5mcd14gd8e1pbakcu5hsili6/jiwewivutivobemar.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/mabebipexalemoxiruki.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/4df41e87fcbcb0d8ba033ef1cc465a18/mudomamisalutamazevap.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/74ed1e9ec41f361633061f8b29e5b40a/lotelawoguzemonaz.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/s2jd1nkgtupcdiv53j9pef9e0r/mogowuzixajuxi.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/11625c466e52c0ee555de40717643408/moxotebutaligugi.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/fubezedagugomilikaxim.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b553ae815---35242682333.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160927ce5dc235---nupopubinasone.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/bozataguvodiragunug.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/22101580588.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210725143838_d3o8av.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/art8jhsfible0240dpb7t1thu0/finewokuxifatagow.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711d3b25762---83927134518.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/28653121272.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc7990ecaa---pefise.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/54650785469.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/2jf2a7sestq6pc8f0o1tlbb7f1/gopodisanuxinedonox.pdfIn PDF document text
    • http://webursitet.org/Files/file/perafedasegazomo.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/52849159183.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/86523326042.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/xofoxuxufemedov.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_off00012ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000146be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BE 11156 bytes
SHA-256: c965f77c1906d5cff44b24ba4aac138cf201f497225de6a2983e491115ba2c95
font_02_sfnt_off0001604d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1604D 17680 bytes
SHA-256: 28c55b4442f553cf2013c346285a4098e79f8881e8bcb6bd5b779c2cbfc6aab8

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