Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffec9404282d20a0…

MALICIOUS

PDF

73.3 KB Created: 2021-09-12 09:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d61abae605c53661acccbb4d5f81afba SHA-1: 09409cb017ce87c4fa5cdb48d99859d27d116044 SHA-256: ffec9404282d20a03a2cfadf89f7d3abe0db290bc064994f11b9e1452b97a75c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI indicators and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pixomot.ru/uplcv?utm_term=chal+mera+putt+2+watchonlinemovies PDF link annotation
    • http://yaan121.com/uploads/files/202109120726458553.pdfIn PDF document text
    • https://spacio.hk/attachment/file/limisutizabipowuzex.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/161398f922046e---27836822586.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/mevabubotemes.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/tefotemipoj.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/sudinenez.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/16467870129.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/37954459025.pdfIn PDF document text
    • http://www.polni.si/Images/files/27216653562.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613958a0ed3ce---tuwowanemipojobik.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/dilibodirupoju.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/widariwe.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/petifi.pdfIn PDF document text
    • http://bronia.org/userfiles/file/pezinitolibegodur.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132c28a4aaf4---zupagimeredikelu.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/vunogefeluwexap.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57696905810.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/pexugoledudakubujugula.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9f542d79a---83792124929.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/55943563596.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/34as3dtk8ahlsfnaafelfe36ij/52297184858.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/fawop.pdfIn PDF document text
    • https://quangcaomattroi.com/uploads/news_file/91398772538.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/kenetujelenuzunawe.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/3470410508.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7D 16524 bytes
SHA-256: 18c1626fea952fa8d5b9f061fe3516ff98cdabc4ff613f7d496266ac7ead821d
font_01_sfnt_off0000e557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 11044 bytes
SHA-256: 7cf759556f7b6eb7feb89aab0cfbf900fd3dfd9834ebc70df1322814f69a4bc4
font_02_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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