Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1c69882a54d4b6…

MALICIOUS

PDF

79.7 KB Created: 2021-09-09 09:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e722bb6dfe8011bb591ba8bd846a7245 SHA-1: 52ec705e3f3c6c72910ea52f920daa2ff15543db SHA-256: 6a1c69882a54d4b663ba6bfabf46f17d5d6d7580c2c2e19dfbf695f96bec752b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397dfb45617---49003580536.pdf In PDF document text
    • http://xn--j1aii.su/userfiles/file/44095699514.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/6343286302.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/44364315962.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/46659898628.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/43476410683.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/vikotideguxigeni.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/kufigavowexikixa.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/delogo.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/97723158172.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/vofobuseluzabonulepise.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/pobupafufadebabozu.pdfIn PDF document text
    • https://bselink.com/userfiles/file/sodojubeterori.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/63359527743.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/rezewoboxu.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/52961755405.pdfIn PDF document text
    • http://novastal.pl/userfiles/file/53641476791.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/12040871908.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/xukubaxajanurodixuvoxamoj.pdfIn PDF document text
    • https://qnzar.com/files/16047801941.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/58910370588.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/14286976419.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109022322025839.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16135baf9698cc---78203018882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=ios+minecraft+for+freePDF 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_off0000d5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 16956 bytes
SHA-256: 4f8b202a5291acfb46d4e647a47a9c582bdd2b97e72d23fb4baa060acabc1ad5
font_02_sfnt_off000119a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A2 10404 bytes
SHA-256: 03423c53b3995b026c41872c7e28925ff31caf57696b72e0925ed3cad715ef64

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