Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07039b060ab8033…

MALICIOUS

PDF

91.6 KB Created: 2021-06-27 10:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0b856e1f90252627975a7cd1bc49b800 SHA-1: 6732e698d3c0c11dfda9fab9b549e21e758eecb1 SHA-256: d07039b060ab8033720b0e045bbd70604d42fbe82f139ed6942f3301d2f22f26
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072d878aa3a8---71884014593.pdf In PDF document text
    • http://kyanite.tv/userfiles/file/26188553868.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/pol35g5i0ajk13i9g3bjqk5ea3/luzogarigerebasefaleke.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/49603058356.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084a5376360e---28400408142.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/kijon.pdfIn PDF document text
    • http://hcviet.com/img-phuctri/files/19578270686.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/pewiji.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/nufebu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa1940672a---24007772731.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e9e69854a---49860277127.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/84203424133.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24f0c92e83---novufogot.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/o1f1fp8kvuv3jlp416kuqhog6u/58979020071.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a6ac7913f2c001d63409fc2097752619/14216298525.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/97794424709.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/7d9191212f6b40ab8d29cec8b2691320/kojobufadifuluxogubalog.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/371f67e77b8759b39a18c6a1c5b94eef/xofufajafet.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b5a76d096---76126824101.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b6c9cb7822d6670feba5d412552f644d/vudimagesatukuw.pdfIn PDF document text
    • https://bursac.net/userfiles/file/65686273206.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a026397da3b---rexagagukoxizim.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a32036161c---7600986568.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/rudiwokad.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/56723455612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+more+diamonds+in+romance+fatePDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/5f8f615a2e306bcddd11782c2acf28f2/60499510719.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_off0000eb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB82 10848 bytes
SHA-256: 421f7bee8db698ac101d01792d2aab7c71207c3a9fc34fa9408b685e35d8ddbc
font_01_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 17536 bytes
SHA-256: 8551dd32940047a417b93e2ea5bdcfba9f299260a00d9d8d30bd9b2640a48e27
font_02_sfnt_off000131f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F6 16392 bytes
SHA-256: 439f91fc52918ec11de7c10fc66f42d556e3ca0baf24f0cec7590a9fe4e8f18d
font_03_sfnt_off00014823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14823 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1