Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7513c03e44d6661…

MALICIOUS

PDF

93.1 KB Created: 2021-09-22 19:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3aad5599297035cde39360c7831b55bb SHA-1: d862d7b6cd86c8a8b7c73019c5478be5d0b66e29 SHA-256: a7513c03e44d6661b9f413b125230b0783602add4d1fed5773d4cc2e91b50468
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads and disposable hosting. The ML classifier strongly indicates maliciousness, and the embedded JavaScript likely facilitates the execution of further malicious code or redirects the user to malicious sites. The primary attack vector appears to be luring the user to click on these links, which are designed to host malicious files or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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=delia+rich+fruit+cake PDF link annotation
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/24288490405.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/vovaniregabekagagif.pdfIn PDF document text
    • http://0048.pl/48files/file/pifetivavom.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f11691a002---sarasodojopezajix.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/91559845138.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/luwiwabugomasolejaxejodu.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/88831065414.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360229d0369---36218342623.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/zovevojadewoxezijoxikazif.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/jiwikuvagisuludiror.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/rapofinim.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/12189208161.pdfIn PDF document text
    • http://siamintertrade.com/file_media/file_image/file/5428036172.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/57915256520.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/31365304306.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/93379279950.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/70707700524.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/76098504024.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210919_9B4FA527E0C47D67.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021090223052320.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d31a8ec932---9030165722.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/54a132cddf5d9b2d75cf164186edb60e/77788175851.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/52909400350.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_off00010313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10313 19524 bytes
SHA-256: de81594dc7f5c1587373fc4f961505510fc0d15ae86b7922f2b3a657d454f237
font_01_sfnt_off00013675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13675 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8C 10236 bytes
SHA-256: 649577de2e1130b62804766707384bc42e144ec5980075aa91c08e661f15a64b

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