Malicious PDF — malware analysis report

Static analysis result for SHA-256 08080ca0a30e31b3…

MALICIOUS

PDF

98.8 KB Created: 2021-10-08 02:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4f5b0e926066ea946ac008c878c0c941 SHA-1: 10f3f7ce435beaa2f56fbcf9e292ef05b2feea3e SHA-256: 08080ca0a30e31b39b03792f8f9e7bfb9e686b210508c4bc629acce4c5453cdd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. The presence of JavaScript suggests an attempt to execute malicious code within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://catamma.ru/uplcv?utm_term=50+shades+freed+full+book PDF link annotation
    • http://bernendorf.ru/userfiles/file/kagizufukorisodudaxut.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/86309274840.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/42635862503.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/gevibegejego.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/tugidobodig.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/6785ee1cc6128cbf6a5477c240556d91/lekedovofovedon.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/zulosowazobamobemi.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/78909095570.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/42911540400.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/rakolukazukawazeme.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/lewofamepipiromirufele.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/vikomatun.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/7043573311.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5e176151e---8453154636.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/nomujakiwulokepebiw.pdfIn PDF document text
    • https://alariel.be/userfiles/file/gewovurazuxoz.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/fa74a146c09798baa53d9011fd4dd864/fiwojabukolid.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/milubawovijeneju.pdfIn PDF document text
    • https://s-oil.hoakhanh.vn/uploads/image/files/zofejodamebaxabenifo.pdfIn PDF document text
    • http://idroter.org/userfiles/files/8638147047.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/menuwapo.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/66829222511.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/161599cac21a12---23629597299.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_off0001176b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176B 10648 bytes
SHA-256: 0979b7dff1658bbcf033d2e21a49d495ed81772282cc9731f16a4d2abb66716b
font_01_sfnt_off00012ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14809 20584 bytes
SHA-256: d75f0b2725e23fcf7360b7ccb9d47743a4f59870bfcab22496ab892dada2bfe6

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