Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0da928750ea3f02…

MALICIOUS

PDF

84.1 KB Created: 2021-06-25 22:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4e04c84adef1a6288c1c70d1e192f356 SHA-1: d3bb265e9be9d831399c00bd057c7e6384c775b0 SHA-256: d0da928750ea3f027e45f3142ae2b8eadd9b5cfaf5fea31a9c325bb02ed93933
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5a181af24---fipipufilupagov.pdf In PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9745d24a4---punaposetezi.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/fidasaz.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a8ec89acf7f527ff83d324e947c5700b/98507875293.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a81df46eb515d49e2216bd859259506e/51558648066.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2cec11b7f---61858741807.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/nekivapilot.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/rawigozixolufakiwil.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/1ef20987da9ab60671f28e8876cf804e/kazodev.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/df5ba9fcfad11c71d4c9566c99dc7a0e/vovorasubabajodulijuv.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/depezures.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918456f1874.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c97c8f099df---tosamuw.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/meserifatelukaxo.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4e8dd9ad7---92607761618.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/gfh398jqpk5b6p6efm9r5gn9jd/wawupurigixakuwifojobajo.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/85325142514.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/04cd50f22a00accd9c811a4f1ec1b1eb/zememoxuduxegij.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/46984793351.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160781fd01c713---72266638015.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607045e407c2a---luvusokugekur.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16076348e76640---26961989932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+get+back+deleted+text+messages+on+androidPDF 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_off0000e486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 11124 bytes
SHA-256: 22a256885619dea41ad5b387bcf47339edc6b888a1e3fb73e3fbf2348ab9ad88
font_01_sfnt_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 16948 bytes
SHA-256: 2dbd43fdefdd71e201bc470c350f483080a4a23489a974a886491f52850c33f0
font_02_sfnt_off00012ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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