Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e92cbc80ce116c…

MALICIOUS

PDF

90.0 KB Created: 2021-06-28 10:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 82e6b500438a422562f777860067ed38 SHA-1: e43c0b01046b92c4688f7e0204f3092a285219c2 SHA-256: 69e92cbc80ce116c82f628082c73f65b21de97da6aee2473b1d1a6735e7c9004
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 https://coretry.ru/uplcv?utm_term=what+is+midsegment PDF link annotation
    • http://wittlich-luexem.de/userfiles/file/mafujifikubupifap.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acab2f7bede---rojodibudukokukino.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf51b6b6912---futaruresuwasefemejo.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/87698070577.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/22122509ac6bff96a32cc826c2684ba7/24575780331.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/komagotonakijufaxat.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/6b5c46390bf716460436fa20515aa9f4/55235818885.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/mrmv6j2jcaikjfad4f6ndllbc5/veludon.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6u1dsub9kutml79v9e5eosq8q6/7585069567.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/ab9112ccbebcda10f95ce3e1b0822496/benafipawozofusipu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2f972db7630e3c2773eab1dc28e5386a/28109909754.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/49884328524.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2cc908cf1---womepepejokisopobasexuf.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210628004432_eo8whj.pdfIn PDF document text
    • https://bamor.org/userfiles/file/zoganaxukolulufidezov.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/97514237338.pdfIn PDF document text
    • http://veivel.com/userfiles/file/99666484470.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/5a8bac8a5c1137a0c0581ff958cda9e7/37129605308.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/loxosamapakogekuja.pdfIn PDF document text
    • http://stattus.com/assets/file/24397842931.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/8d4c257f84e26c7666bfbaa73609a407/mawapagijefo.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/77401786537.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 10420 bytes
SHA-256: 66b0669327e247538260619a7abb5f9155840adf438a7d2a2e5fbeb06a0b8f3e
font_01_sfnt_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11424 16168 bytes
SHA-256: 34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29
font_03_sfnt_off000129b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B7 18240 bytes
SHA-256: 47e2add17598b5c3301800dce78acc34eb45dd92de90a0bf7759d2143d22d337

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