Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1c492389cb2f4a…

MALICIOUS

PDF

94.1 KB Created: 2021-08-12 11:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 41b89b5a26480368cb6fd9441008d01f SHA-1: e28062c7747de7beb1e6c2bebf6075693d239ec2 SHA-256: 2d1c492389cb2f4ab7a0be29f3c730283ba87808d754e1088ef9fccb3be6f8a2
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to PDF files hosted on potentially compromised WordPress sites. These linked PDFs likely serve as lures or further stages in a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16083732842bdc---rolowek.pdf In PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/tofawajutewedaboxov.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072c769e1596---53661166390.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/xewidejakakopasax.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607242fb14343---3165728500.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e03e236a5d211f97fc1fa575bc918a15/12331807510.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087709b247e5---82505094568.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/53902479763.pdfIn PDF document text
    • http://eden.pk/mycms/uploadedimages/editorUploadedImages/file/lokusorudejipagedu.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/53ba302046a00e39cea506ad5223f3f7/taxevafogasabofe.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e21cba5b71---8097943311.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608666720cdc8---15537062504.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210522194804.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d3ead4e29---muxiwenut.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ea3bf37de---66831998120.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/12766382927.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c061d620d2---11841386731.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/nuxuzojubisilitip.pdfIn PDF document text
    • http://a-pointpro.com/cms/ckfinder/userfiles/files/25552086951.pdfIn PDF document text
    • https://xigmatek.com/upload/files/vatukanaxagixumovowejal.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/88038268729.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/dcabf20c35ab6440aa2a8ea831844230/tinufuxake.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/63462458139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=partituras+piano+faciles+para+ni%C3%B1os+gratisPDF 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_off000106a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A0 10964 bytes
SHA-256: 0ab32939af60b43a55bd247b475a7288b6a663cb763cdd62978666f189070348
font_01_sfnt_off00011ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF0 18708 bytes
SHA-256: 36ba399e657ec49b9006cff16b59bcf04b0c04f7d90de6b068efab006951361f
font_02_sfnt_off00014fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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