Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd742d55076e0cdf…

MALICIOUS

PDF

89.1 KB Created: 2021-08-11 05:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: ba060e2a7d625c5b4b7926d8d6854c65 SHA-1: 8f92f07bc2d539311ed777c95f5a066cc5eb9ef8 SHA-256: dd742d55076e0cdf55705c083fe35a15a55e601206d9ee09ced2be045e01eeeb
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/51db7faabf74d51f19a1b964a98af77e/gasorake.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4b49815e---kamokazilokedeguf.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5540154fa---sajexajutezizaletolap.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/fa1751d90aa42b10798e35d65c99e6c5/devamitunufuwoziso.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/b2901f9856594e25b7ee2a8679aed436/laruwigetopogivalebif.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160becfca16ab9---suvarazubasiwapunijewuxuv.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/bikofizajazunufige.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/39286902708.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/6848635817.pdfIn PDF document text
    • http://godswaynehemiahmbc.com/clients/878002/File/75502616104.pdfIn PDF document text
    • http://orlickachata.cz/files/files/zajesupapoju.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161069201e3358---12517463731.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/tebudul.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/63101da73b4fa039b8c8e6226fae79cc/61999657680.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/bfcdc0537ede72ce93dd3c0caa37ff86/84806382902.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/buleniwijulinuv.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/43186112398.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/91146165373.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/591408ea8c7491ff0ab6f087cbccfd82/zijugukomu.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/wotuxo.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e2c656c1817---54847722609.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/9b5c4cc0a092751db94913496832b54c/98678763154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=advanced+portable+car+camcorder+fhd+1080p+manual+pdfPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/lefewejivamo.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_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 11296 bytes
SHA-256: ec0fc9a60e394af81b8aa722efa52e144f4b9482733c6393b31a0785e1abf2fa
font_01_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 18756 bytes
SHA-256: 449392301ed3da0c7903e50408e66757b4dc02962a7d102a0e4747163b2d86df
font_02_sfnt_off00013dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1