Malicious PDF — malware analysis report

Static analysis result for SHA-256 7035ac150caff2f9…

MALICIOUS

PDF

80.6 KB Created: 2021-09-08 21:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5be09c43dc54f1d5de55746d4d715f5f SHA-1: c5c12287e95fdf70c558c36be1fa37ac32f42bf1 SHA-256: 7035ac150caff2f97acc5528f4dcc925b95c272cf1809c989e38b76c3f9980f3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on low-reputation domains, likely to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=picsart+download+for+windows+10+64+bit PDF link annotation
    • http://sunil.kr/uploadfile/fckeditor/file/sifizoxoju.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/rakenebil.pdfIn PDF document text
    • http://knipia.com/userfiles/file/sovidikugomedud.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/50048579753.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/47935455934.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/zizaxuxetejipi.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/74504711320.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/vamusagomijodedixaro.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/bifinalasurokuse.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210903_074614.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/32889294675.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/0de8759ddb5064e2bd8a8957985f3209/kubotasafagilusofogawumuk.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139061062b03---67245091732.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/18519613503.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a074e18e0---45522943597.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/15381757015.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/sixivilaperufurogedoko.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/gexevajilizijetidof.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/pugaruje.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/57702629601.pdfIn PDF document text
    • http://speckrepej.com/upload/file/mugetixutowave.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/98f666026a9a42cd3575c11552090d20/80173733636.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/jazub.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_off0000d8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EF 10984 bytes
SHA-256: 716308e3c86de7c2073fdb82b3c8f5abdcc1736d397f0c7da67ddbcab8927813
font_01_sfnt_off0000f2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC5 16340 bytes
SHA-256: 8c55e144f29d171511f62f0abe5fe02f631479a7081018ad8936d531451ba0fc

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