Malicious PDF — malware analysis report

Static analysis result for SHA-256 be18a8a29f4aec97…

MALICIOUS

PDF

84.7 KB Created: 2021-08-19 04:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4e701d9afcb76406e84b17f6aa5d19ee SHA-1: e001df37f2daeb29ee09bcde9f8b0716a97142c0 SHA-256: be18a8a29f4aec97b8ef8fd4847de59019f7c41e9474e25fb9b3ef7cdfc53540
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to phishing pages or download further malware. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72c8433d17---dobelu.pdf In PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/198e15f1df4708dd6a75b37b2c5b9e6c/gojijirotumefun.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/716a9cf5b75b8851e09d461197774b51/lujepejidi.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/kibatufafi.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608eede0543b7---dubodal.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/a5352b3d8b4acd97d148ea2acac3bc88/kubalorodupusuluwedu.pdfIn PDF document text
    • http://axwelindia.com/uploads/50430810347.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade051a073b---xanute.pdfIn PDF document text
    • http://strandedtattoo.com/file/16456064672.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/75928966956.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/mjekg2mvgdtd0e2j10ajk5u4n2/xikigaguzunido.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/f89bbd7aecc87a4e142f126b03ee3b17/ziliradewobizajugu.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/a3a92a0d3c0767334c89d5a696558bdc/31343776749.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/reredediwusagowupawe.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/16383286819.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/583ac6a360a16c10d8234847e6abe2b8/24453146242.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/92682246416.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d329a33bd77c9a3164dcb892babae6d1/94228072814.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/46782843181.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609405d02ac55---44746216451.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a9329a1881b6c56304b8c8bca2392571/38032888072.pdfIn PDF document text
    • http://imi.vc/upload/files/80868916010.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/lulanul.pdfIn PDF document text
    • https://actor-conseil.com/files/file/43046665717.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/tifogupobimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=can+i+improve+my+amhPDF 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_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 17916 bytes
SHA-256: 672dea4c98b188e642cc4e4661e2c879bcd9c2ed95925b7a5ab5658e01b0f286
font_01_sfnt_off00011437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11437 10416 bytes
SHA-256: d77f136acf97024fabb55c6a4ec3630ccd64ba40bcba5aa7d7b8b80fe9131402
font_02_sfnt_off00012b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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