Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9354439a19210b…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 05:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bb4408328842b9ce822c74aa956c88e0 SHA-1: bef50e2d581ba508a6fd746a15ed3eaa9ba7f250 SHA-256: da9354439a19210b6ef9ccd364849e7cc9cf0e0cc76b56af4296bde4d16a7099
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160719d8250184---kuvededubemuraja.pdf In PDF document text
    • http://spamsmsgiare.com/media/ftp/file/49423642532.pdfIn PDF document text
    • http://msiutilities.biz/documents/31596767382.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/oudvp76d552rt3gm5491v8g439/kewodijarukuk.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/71321695970.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16102ce3c6f79c---16217545043.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/537daa282fd7c326b294cbef3e780349/somadabawadutusubu.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eb8231696---mutotozefarub.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/1518409863.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/48921040045.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48720b2c70---bubumipunixanegoruwu.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/53961906624.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/bevasajewelusemu.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/9ca2fd96754de4a09029483953048251/80560555282.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609e076e42f74---98583859202.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/92943284626.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/36333178514.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/34635645810.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eee268cf1d---53401410042.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c433e13f4---39410990763.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/kiwuf.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/degitu.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/55334477913.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/130651274555.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=come+ridurre+peso+file+pdf+macPDF 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_off0000dd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD26 18016 bytes
SHA-256: 958dc8f49f60d9db83c3de1b9363fdfbf7c2dbba52c1e2b057477843b01cd903
font_01_sfnt_off00010ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA6 10712 bytes
SHA-256: 9c33d591acc5e3b3589775b02f3ef1614583cffc49dd8895719d2423d25a13ef
font_02_sfnt_off00012540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12540 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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