Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ba1d1154b406c1…

MALICIOUS

PDF

75.4 KB Created: 2021-09-30 20:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af0425355d3199d4770fcf18e8e77225 SHA-1: 9fbfd074473b3ebdb4ab0b6bc82d8e6240d172e8 SHA-256: 05ba1d1154b406c1a6aa58e9730ecf4b7b0114d91d506ea6f91cde3cbfd47224
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress uploads and disposable hosting, forming a link farm. The embedded JavaScript likely serves to obfuscate the redirection process or initiate further malicious actions. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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://proektasis.gr/admin/spaw2/uploads/files/namewejuged.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614e7ad4067dd---8346529152.pdf
    • http://sicilyontable.it/userfiles/files/59696476867.pdf
    • http://sonnenheizung.ch/fckeditor/editor/images/file/saxinenidumu.pdf
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/11553293042.pdf
    • http://istanbulballoons.com/ckfinder/userfiles/files/34462167393.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132fabe270ad---94863230867.pdf
    • http://babyshelter.net/assets/upload/files/borisegu.pdf
    • http://dispensapertutti.com/userfiles/files/pefime.pdf
    • http://np-laser.com/upload_fck/file/2021-9-25/20210925040924774964.pdf
    • http://yingtailong.com/upload/file/210911062021647668omh1p2tgpgj1.pdf
    • http://mitroc.com/userfiles/file/55718207570.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/161505a4169663---pawesapemapefajazupaxesa.pdf
    • http://td-mg.ru/uploads/files/tilevibeg.pdf
    • https://milorem-service.ru/userfiles/file/lezewunekuzawujifobagesi.pdf
    • http://audyt.rowerowaszkola.pl/imgturysta/files/vuxoduzusufunomade.pdf
    • https://termoformat.md/img/files/7392560087.pdf
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109241549376573.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/ridesagupajopejip.pdf
    • http://faithleader.org/js/ckfinder/userfiles/files/86437525075.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613888802b09b---suxuxumebigisan.pdf
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/77882401786.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16150d62134510---xabixogajezemuk.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=cook+up+a+storm+voirfilm
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB1 16792 bytes
font_01_sfnt_off0000d3c3.bin
58a7c5fb27eb1e688476d1e247e6195dea909a6e3ecb3127eb200d322f591b20
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C3 19200 bytes
font_02_sfnt_off000105bd.bin
7508fb57635d9c7f6cf0b1c0d3e36db6b965d833a1dda0833769b9ef75de8e9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 10572 bytes