Malicious PDF — malware analysis report

Static analysis result for SHA-256 045b49509c467f55…

MALICIOUS

PDF

104.1 KB Created: 2021-06-26 22:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c251abd6a8d5cd75fddf6af108d94883 SHA-1: de015e2b96363464e0e1ac1de82ff3a0ca219767 SHA-256: 045b49509c467f55b4e58d84ba227c60c61552f09882768c262437f0367281ca
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress upload directories and other domains, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond what is inferred from the heuristics and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083036e1323d---leminotis.pdf In PDF document text
    • https://swift-tw.com/lcc/upload/files/27869010370.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ab2217eb6---dikizoribu.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ajaeaqoitvui87lj0psauea3e2/35839338931.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/546c7cc14d1e267b9cf8194a635b7e22/42039596089.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1c43dbc51---48398559963.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071f60f589aa---32134882929.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/q1v0mskq50hob4cksqollgah2b/mujatenujiwibeta.pdfIn PDF document text
    • http://nakatka.com/files/file/bifizavobax.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160759a5a2eb7c---20895265255.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/f30r1qmlsmi7lf06nhe4o17akc/solujujuso.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4c19254548b31f6c5f27daeae364215a/gaxuginoxi.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879d7cefefb---80000417715.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa59d9d5064---60151371105.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/95602441466.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/c5dd4b813f947448eab33ff82804eaa3/rilutujido.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/kixilojuki.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f76597629d---gepupizelojisubiwowos.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/bunebisosigikuwup.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/42024863606.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/77260495191fd0839e68b77ec4ac3e6a/38348851798.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/90855011a99df358e5b3c0597ead20b6/tetuved.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f22ef1d15ccea3d666c57df25284bc88/mazelamipipoluti.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084767e53d3d---dovovejowip.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b805ceb5f2d---67632843404.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/f521d3bb677df1aca74b59676338462a/9115919536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=sketching+and+painting+classes+near+mePDF 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_off00013100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13100 11008 bytes
SHA-256: 40c8cb21d3d49e660324226f5cab7e83da9b69c4b10b9633e2d22d86a070f61f
font_01_sfnt_off00014a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16242 18656 bytes
SHA-256: 345ba0b8fafff7f070782ec55c15ce3dd6a093d02c3f1d2ef955c9bf4b94213a

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