Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcebc69c8da65831…

MALICIOUS

PDF

86.3 KB Created: 2021-09-07 02:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: faecd4dcd4fa9eca7cafb08be24ecb92 SHA-1: b5d31722a9befbc752c55d4fbc132219d6a1a84c SHA-256: bcebc69c8da65831b649cbea3397bfc6c3d3e38d713db1b440006ed5ac4c0ace
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f92f84bee52f1b04483af343aaea2ee0/8332172641.pdf In PDF document text
    • http://mwcapital.net//ckfinder/userfiles/files/fuwezizupovugoxek.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/36bb070deb2dffd9d9e1bc4fab50ec8a/66775940715.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/lofub.pdfIn PDF document text
    • https://cristalensi.com/public/File/52889816311.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/4ec930d49433376514d0f4aaed26f9ce/60556760636.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/36745868664.pdfIn PDF document text
    • https://elemonbg.com/Files/File/mokegepora.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/gigudivapazogave.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/64334908522.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/jjjtmh68kameev4rkvq9nq77s7/66783503658.pdfIn PDF document text
    • http://bdsductri.com/upload/files/bumitu.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/eadd60fc62e81752518547e27c6745d2/samopomox.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d86dbe16438---59491785645.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name//files/vamekevibo.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/83433350858.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096ac30bcab8---bawaduv.pdfIn PDF document text
    • https://arerp.kr/data/file///zinovexuzinafunejixo.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/33966251602.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/tikarabolefofef.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa80d660e53---nibegerafutovabumoz.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/wubanuf.pdfIn PDF document text
    • http://samtle.net/ckupload/files/marur.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1612998b58bdd9---55543592668.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9f29adf0a---pixuxuzefaxe.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/wojap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=el+marques+de+sade+juliette+pdfPDF 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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 10792 bytes
SHA-256: 1f0524e9fbb9dcc67e69465024bc9ac71438fad526709dda436d46ab9595f969
font_01_sfnt_off0000fd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD98 20828 bytes
SHA-256: be27ba0d861a7f6e5d7ca0785586293474a389a8fa4b677cb10a08f488fbc3e8
font_02_sfnt_off000131ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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