Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1cd87b6cc5010c…

MALICIOUS

PDF

85.0 KB Created: 2021-09-04 04:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 21996fd5ea12e75dd35925b050e57303 SHA-1: d0c6852b8bd17e9fe6f777c68461eae1cbb48871 SHA-256: 9a1cd87b6cc5010cf80c1474114385fdc4225ba926b5cfa5d2f31b43ff24c9bd
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The document body was heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://ehotelgateway.com/bot/ckfinder/uf/files/76294285808.pdf In PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b7b782b3a716a7ef869162c6129e1503/susejinegojazodes.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/kijexugupezewojironutu.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/xasuviwulepirudozudife.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160fdfc221c172---bavofujapox.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/10565055238.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/12789677033.pdfIn PDF document text
    • http://fnathservices.com/upload/file/81339798842.pdfIn PDF document text
    • http://unsersohn.ch/images/file/59673201507.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/26254159776.pdfIn PDF document text
    • http://plncse.hu/php_data/file/89618254346.pdfIn PDF document text
    • http://fairview68.org/clients/c/ca/ca24e3df3ff7fa9b839de6c08aba9959/File/63455572124.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a41a54accc---35782984493.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/tozimo.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/39604255776.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/13518139216.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/wufidoradeve.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/24421285817.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/717d2120f886325fc2b097cb8d1777ea/gabunokuxovijiwo.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a692bea070abf93916359f3849e20f78/bodevupafosoxujitigigabot.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-29/20210529174439108797.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/38151386739.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/49795661277.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83cb55f7a7---53988347450.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/71253055661.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/asjvocj9o53snsa8k82klg84qp/4189628958.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/18040571255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=metabolisme+natrium+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_off0000e66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 18312 bytes
SHA-256: f5adaca1984a55e767a3cd364318ebe2b9520df3cd7fc02dbff234b01fb038fb
font_02_sfnt_off00012d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4C 10892 bytes
SHA-256: 384a7bcbb1bc3ab5e57a14f3d1184bf97f2784bbb9642aa2e8a7c0023af836d8

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