Malicious PDF — malware analysis report

Static analysis result for SHA-256 28aed7f92c32c033…

MALICIOUS

PDF

80.5 KB Created: 2021-09-07 01:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f8d367a4f950baa2ed70b8c8e4dd9007 SHA-1: ac8f297a337c46630079be8d2c9dd3b046c770fa SHA-256: 28aed7f92c32c0339fc79e2bc72a2b9e73545dceeae8c5663aebf757214e9183
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting domains, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://holzbau-napetschnig.at/17851381452.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/fedilitiwagajesasabiladub.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/gavinugevinetuwu.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa47751dc86---zagonadelido.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/dffdea2dac5386a2a17edf9c488abe07/11698771206.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b025bef9d---50431865599.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/477d3a83ffca417c0c7e3f0e677eab33/satixozatetowesap.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/fbb5b39ff35c9fb72f2952d9441fbeab/59600060649.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/aeba9875fcc41bacfed71d8cc7639f86/90383661857.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/3266810852.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/bimawukiboloxi.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/87591342464.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/39m30cc67c68u0frrcc4qq76b0/mefipuminuzabemapulujevet.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b65680779e9---banabesozizimidegebabe.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/efb88af35b8d833d1a001f4d9869ddde/davufawovi.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/18968877755.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/vututusigogexupuxojolu.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/lapijaxosixipoka.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/95839631711.pdfIn PDF document text
    • https://ubranni.com/uploader/files/50258947766.pdfIn PDF document text
    • http://beiks.info/public/file/viwisufepuder.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/kizenusisimelavor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=importance+of+literature+review+in+research+methodology+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_off0000d56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56E 11384 bytes
SHA-256: 6e84fc41a40bb999d150867d15591933bf9ff55c30c46c66dd3f264686cc07d9
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F9 17260 bytes
SHA-256: 9ba79e74e011ff47e0b217fd2ae42ee676e91025ffe7b7362c0742f73fdf5ed6

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