Malicious PDF — malware analysis report

Static analysis result for SHA-256 0628ea3c306515f7…

MALICIOUS

PDF

102.8 KB Created: 2021-09-18 17:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 42dbcf06362599abcc96b1cd01c4a434 SHA-1: 392a0f025938c522267b6b180a3818e7e8f70447 SHA-256: 0628ea3c306515f7da4c5b43cbbfaed429f71c32a88489a1646aa944ae138fdd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a primary mechanism for executing malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://garglob.ru/uplcv?utm_term=bollywood+movies+gomovies PDF link annotation
    • http://bandenplaats.nl/cmsimages/file/rawagevamaxez.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/divukirusekerekawufag.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/92484966774.pdfIn PDF document text
    • https://kawanmto.info/contents/files/jubipamibiwusizelevelow.pdfIn PDF document text
    • https://airshow-bg.com/file/vujosik.pdfIn PDF document text
    • https://digireg.com/upload/walupuperirud.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/12000943828.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/ridarug.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/saterelop.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/dabikutogamor.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/nodinizibexozexiwosugot.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614229764f06f---bibozamarove.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/40196790572.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/75844730592.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614319a859823---35782491529.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/88387057234.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/54413258418.pdfIn PDF document text
    • http://favorit.pl/userfiles/file/93910551015.pdfIn PDF document text
    • http://alkanboya.com/files/file///dajexa.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d78953766eed8dba67a7cdb64f93cfc1/57987585532.pdfIn PDF document text
    • http://etnorom.hu/pictures/rerigudumil.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/xipipokiti.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/38606116140.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_off00011aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C0 17548 bytes
SHA-256: b5047d561ea6bddc1cdc5327fd2ce5fa5d22d9a96123d335193c51cffadfde1b
font_02_sfnt_off00015ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FFD 17564 bytes
SHA-256: 1dd4d61057f846cc69671f78fc3d05072b7db92905d39617904fa25b9f9c72d8