Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38ea46ebc28e0ce…

MALICIOUS

PDF

77.8 KB Created: 2021-07-21 01:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2fc947d0d64f874529103aecbb09a43c SHA-1: 5bcf419b4619edb213ec443263e744eaa71d9283 SHA-256: d38ea46ebc28e0ce7c74cb488c5045282d3bab533da4ca3bfdbce49f64aa196f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious content. While no scripts were explicitly extracted, the nature of the links and the PDF structure indicate a likely phishing or malware distribution attempt, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9bf166ba---60324846912.pdf In PDF document text
    • http://konemara.hu/userfiles/file/60097466357.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/gefobawajazedisogepum.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/19059187510.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609209a818767---vapixezij.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/36b006529520555be79d5f10f88fccb4/5823892192.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/93779401602.pdfIn PDF document text
    • http://446888.top/userfiles/file/xeligonubube.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/dujanusakopademamodanigo.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/gowepamidobugojut.pdfIn PDF document text
    • http://autofulltravel.com/userfiles/files/sasodizolaz.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/timajuxedorekobomaride.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1230f3ba---wonafotamukoze.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/98749312267.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/62279717819.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/puzefuda.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/21408565304.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b46789c3b7---valuxuzub.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/tedur.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b6e6c7c5c---vunaditimet.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160703c25532a3---memozoluzukuw.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6e889c253---pirodorelaxalaze.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/2af36bff60108fcd0aaed3acec8c1b4a/poxavepolapogokubupubej.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/8baa686dfbe597796aaa8e5af832184c/mokinudimilovonitusemad.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/nujuwutuba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pita+and+grill+oakvillePDF 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_off0000cd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD14 17648 bytes
SHA-256: 19f79f1e4732a3a095150076d204515a0e1f37cbe3f5de07e1234129cb25cf87
font_01_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 10412 bytes
SHA-256: 937390e6a614832fb77714bc5c914041c845cec71ce6e7c172266564b0d51fae
font_02_sfnt_off00011250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11250 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1