Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d188321639f9e6e…

MALICIOUS

PDF

97.5 KB Created: 2021-07-29 22:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c9634866bb1a60b2f7c029e66546669d SHA-1: b387f2b1f95137e0ae9986cb5b0f5f6efab59d77 SHA-256: 0d188321639f9e6e3fa6d092257ce3b95ba51fe8b1f471ef5ea66828486d509d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a spearphishing attachment used to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/hgtoqjcq45qgfngmgrd7gd7493/gemexexa.pdf In PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/tisutukute.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/42295900811.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/monamuzimejoge.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec635629b1---84723909547.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609acfe216ad6---87990080898.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/vawigazitewo.pdfIn PDF document text
    • http://jar-ted.pl/file/basivani.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c8b658a8cde6a3c6efbe5b53626cd76f/pajuxogidewuzuvab.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4e78e09b2f792a6be15b1b5defee1d34/85828963448.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/594198469.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/xuwuketedenevaxezokapoku.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/limotakodupixezapot.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/4019279949.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/93405311882.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/83642553601.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/d365374e9277178a9231b849fc2a1804/bupefewa.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/dovog.pdfIn PDF document text
    • https://digireg.it/upload/98444120726.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/raboxewivet.pdfIn PDF document text
    • http://gdgom.com/upload/file/210612083354779882ri4g1zyh8wfb.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/demiziratexobaxuben.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/67584531157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=minecraft+bedrock+command+guidePDF 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_off00011713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11713 10932 bytes
SHA-256: d6d037f313205e14e714240a04035f11db13e66b46e30123cc9144ed217295de
font_01_sfnt_off00013036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13036 17500 bytes
SHA-256: 473300462a75ae93b1aec3d04b77fd17132f810c9a1a100d4ff4903d2cee1f8d
font_02_sfnt_off00015e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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