Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb207612f48ccfb…

MALICIOUS

PDF

121.8 KB Created: 2021-07-28 03:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0e5e6d2fe79f737ef32d46d3ed6524bc SHA-1: f7bdd3ec3f3ac0b7771a728b581202e963a2cbc0 SHA-256: abb207612f48ccfbd691bd89f229d176f6f0c7719fccc16f7b9065ace58e137f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised or disposable domains. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a41c5558---67128550051.pdf In PDF document text
    • http://aqbnb.com/uploadfile/file/sexusederomuti.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/93545676604.pdfIn PDF document text
    • http://rinsacars.com/files/others/kopej.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608317735abe8---70913318608.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/jonolobuzijamapejujidixeg.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608370552dedd---fixinafufizivemidiza.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608394ee335be---30689271815.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/22339857023.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36a87389ea---raselirodesexizo.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/91511887206.pdfIn PDF document text
    • https://bnovum.hu/downloads/8195702395.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/u4avskbdreo1mv1n8n5ipglvc3/revuv.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/be9503ed508c6764ddcae1db532e5b59/2510827847.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57816ac5e9---967094529.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/vuxomatusod.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf7b408be0---sawasafiwaliru.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f112da82---nezuwokabavojizufawevujok.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/nufatijarez.pdfIn PDF document text
    • http://caramelitos.sk/files/kelebexewonajuremivepes.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/36889263291.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/malakofeboner.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/13380758358.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/12796040945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=new+york+driving+permit+test+questions+and+answers+pdf+banglaPDF link annotation
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/49178798712.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_off000162fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162FE 4824 bytes
SHA-256: 5f2617ef00d132f437f1c3832dd317b414f1a8b22d6d76ae6a35a25462a76440
font_01_sfnt_off00017451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17451 18976 bytes
SHA-256: b2baad7905aca6149ee9a0a5551555e6d80b2a97a519d6e865632eeb67d07a62
font_02_sfnt_off0001a48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A48D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001bca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCA4 11564 bytes
SHA-256: d8ed671e8c4cb75b58178312d3ec353e1a8b28bf23f560e45f6c25b4fe8ae86f

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