Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0dc5903f698c26…

MALICIOUS

PDF

113.8 KB Created: 2021-08-19 16:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2ceee9a281effaff2c67828b092411fb SHA-1: 538f3814daafacd1990e2dca214fb64e67d23e56 SHA-256: 1e0dc5903f698c2607874149461b97f6bb04f783d8bca362a50437612cb699e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to domains identified as disposable or compromised, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious sites, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ibtaker.ps/userfiles/file/69186791785.pdf In PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a04720585a9---letovulibijubejajatajelu.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/zegaganipurenu.pdfIn PDF document text
    • http://www.asslar.de/downloads/bokifugezasekatopeg.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/60962563520.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gotigodi.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/48903643883.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/xovekadavojile.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/38311624472.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/ludekefozemogeso.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/e9c87a844f1214efa95c30e2e0b9e914/guvumalusewomufob.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/582baabd1aba4120a6e44c466eeec082/22792290556.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/7rgc8obcse8mumkfoif9iu7sa4/45275026473.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/7f2bac5f42a817bea265238c41eebb30/75747215122.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2603353025f99cf6ebd7cfd6d11618dc/66062602049.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/929d87ebfdc28520cc60610d1bb86da3/86710371127.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/90289889944.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/8127438842.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/5063ebc8be3a0333b043878fab7a8c01/72785035137.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/uhq5nul0km2ovi6u0vkvj3rb0a/pazepilaxiripad.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/fufasanepixunanepegelow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=is+kempton+market+still+openPDF 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_off00015a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A1F 10456 bytes
SHA-256: d36605f0c83a6f0bbfb823c21bf77cbcc1e1056a1df55ce7bce83c45791b7970
font_01_sfnt_off000171d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171D2 17640 bytes
SHA-256: 069a0bba5aafcc787058f72113ddb79b681ea79c7aa91add44f2450713b39c17
font_02_sfnt_off00019f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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