Malicious PDF — malware analysis report

Static analysis result for SHA-256 40d0138502a854e0…

MALICIOUS

PDF

102.0 KB Created: 2021-07-28 04:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd17a1051339f51b4fffc641cfc23502 SHA-1: 2a0cd2923e9cdf1754fa2f8a904f7c37457cdcfe SHA-256: 40d0138502a854e09bfe425685bfd9853a6ad21a2de34034a9614b3cd2bbc85e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. The embedded URLs, such as http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab57ea90558---fedufusuburexuwix.pdf, are likely intended to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9534

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://bellsazshihtzu.com/clients/878694/File/dewofelezerufi.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/1810gr5rneoelgua7aih3kff81/44714285266.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e3615f330---22858002232.pdf
    • https://ideylia.fr/uploads/file/45069083159.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1b35bd06a---wewekigukuvede.pdf
    • https://247christianity.org/fckeditor/userfiles/file/koviligazilajutubuj1626601650.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab57ea90558---fedufusuburexuwix.pdf
    • http://khodahoanglang.com/admin/webroot/upload/image/files/90665755335.pdf
    • http://epoxidice.ro/mm/file/54214653637.pdf
    • http://marathon-gexin.com/Uploadfiles/files/59087637476.pdf
    • http://exmar.it/foto_fck/file/sobeponomazivito.pdf
    • http://brooklynsmokeshops.com/admin/images/file/dirakep.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/pojewizepoxokadulaj.pdf
    • http://agnieszkapawlik.com/userfiles/file/15037511077.pdf
    • https://xlspandoek.nl/userfiles/file/zufifilunegop.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/a0e4c190f129bff79132d0200053dd0a/suzogomimelagowasa.pdf
    • https://securityguardsupply.org/php/uploads/file/zivakasupikorixomojapawo.pdf
    • http://xiangzhuan.tw/upload/files/49470749923.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/06ec9897c884f64b0b481dace744f2c9/vizesupugawununupupaji.pdf
    • http://jumpstart.mobi/ckfinder/userfiles/files/jinanuvokow.pdf
    • http://fzsvybbs.at/userfiles/file/60603903726.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe1bd95323---nuwexebed.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/6465a1532144311f81a530411141b119/gapojodidezafimet.pdf
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/51320550429.pdf
    • http://mikailang.net/userfiles/file/20210505190537_468420948.pdf
    • https://comptables-publics.fr/userfiles/file/bifozozika.pdf
    • https://dynasty888.com/image/files/20210528_140055.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=paginas+para+descargar+peliculas+utorrent+gratis
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001048c.bin
62e5a10c236ebbca2436a81c28eb152642f7ac67010ab9f5b5bff94ec7ff98c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048C 19216 bytes
font_01_sfnt_off00013656.bin
07cf0fc2ce1e6917e2e62d7b7d3aedd41093eee860948ec05023928e073781a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13656 10788 bytes
font_02_sfnt_off00014f18.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F18 16792 bytes
font_03_sfnt_off00016725.bin
7894ce70b85315a6af0017eff107d8db111df3da1f2c3411a3d74d8820d3fe9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16725 1852 bytes
font_04_sfnt_off00016f98.bin
dd83067eb133e7faa5eaf37ab1fe78ce06fcf953ed0f23962bc054b64bea50ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F98 16316 bytes

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