Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6da2c7d397c1c62…

MALICIOUS

PDF

78.5 KB Created: 2021-09-06 12:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6cb79500518ee81f2c8ad209ec77f927 SHA-1: 005c9e000444061540c203e2387b9da0337a8177 SHA-256: d6da2c7d397c1c62e10cccb1e9e063cacb85e4816a070713cee8676e97fd2985
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The PDF also features a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious files or phishing content. The presence of embedded JavaScript indicates an intent to perform actions beyond static document display, likely involving the download or execution of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e90e218480---busipidijagovo.pdf In PDF document text
    • http://atthaya.com/file_media/file_image/file/genemogojosaxasivebetixex.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/gufaveji.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/53652740393.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/57941319958.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ade0a830d---xidelekuxegeretodineviti.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/texefumuvukigo.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/ridakakesumenasiravuf.pdfIn PDF document text
    • http://northcity.rs/slike/files/31295076144.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa2893b70b---3972260654.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb51f7ad5d9---vilasoworamo.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/23788664221.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/xopewamozitusojaxerozeran.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/zatufofixijo.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/fobaxazubutekoxugusawo.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/47697410980.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/87520430250.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/538597586.pdfIn PDF document text
    • http://matthewsmillsreunion.com/clients/c/c7/c7863f7b93cb17915b2a89d887155530/File/naramawedonaz.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/38167191567.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/97198935495.pdfIn PDF document text
    • http://yuha.be/_files/file/fizovoxelepetilezadibajog.pdfIn PDF document text
    • http://torgoborud.org/images/file/54631970826.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202108091651488702.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/12751919719.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/kqq2s16db5v0nc2ujnps017010/49878943955.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/junikivopavurawofigin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=wiley+cma+2020+pdfPDF 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_off0000cc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC97 18320 bytes
SHA-256: 99a4d1add5e59773efaa44234ac0b80e85998e5967a9c5e8ddba8a849cef3aa5
font_01_sfnt_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 10540 bytes
SHA-256: 57c4b8603c506a0b30168152c01ea91bb7e7a532799976f9486a59c40dde424c
font_02_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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