Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a0dfe9d2bf0ea4…

MALICIOUS

PDF

81.5 KB Created: 2021-09-02 12:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a40ddc632d52870c37dfc87e369c00b3 SHA-1: e1ad3ad8ce8a8c82ef512034887eb47a39251b82 SHA-256: 03a0dfe9d2bf0ea43f78280c42347f4cf930a3d3093dc73b2a0bb361df32a197
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of links, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The presence of these links and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/81508529bb17f9560cb2af1c1a40e062/4302893440.pdf In PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16073d73308db8---tirabekalowefovawug.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/5825849852.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f5edc3317---85973014833.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/87003480624.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/roxipixotikekamiwomexoxu.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/22016922125.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/e2188f81acdb613c426abc808ca1d4cc/16360569594.pdfIn PDF document text
    • http://djpress.pl/Image/files/pevedezivorevidasujam.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/e1ef9ba413a72c22674be1096d0fb350/govupidudiroxuzi.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/21798343437.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/60315085265.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/kagagakisajakatode.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/85083583532.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/18241625405.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/ad4ec03dfba4ef81040b6bccdc3849d0/gasufetibenamutoxila.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607feceb9542b---78819953211.pdfIn PDF document text
    • https://masukpt1.com/contents//files/82052942448.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/rolavikomu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/j0mdfsrbt1pe0rgjgp7cr0sbg5/sabenejodeg.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160801bb82f733---73202130427.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/vatadipeno.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad28c459b1---vifevarizos.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/fejenaxenazefomelon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=gradualism+and+punctuated+equilibrium+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_off0000da8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 11084 bytes
SHA-256: 126884b8a11b5d303718d31f01962a4bf751dd509d30934d31c343610082b979
font_02_sfnt_off00010c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C03 17192 bytes
SHA-256: d750f60b50aa0c9144116006bf7512032151dbeae59f2f052c83655beba191f9