Malicious PDF — malware analysis report

Static analysis result for SHA-256 22aa6aceef7a27cb…

MALICIOUS

PDF

79.9 KB Created: 2021-09-14 06:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 397c562c83008e258230d990a218027f SHA-1: a50bb8ca0bdbf2619ffcbcae70e6916f72d72209 SHA-256: 22aa6aceef7a27cbc0e4e578dd456da6597533466334a2bcbd11dd499097161d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely serving as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://chcial.ru/uplcv?utm_term=yugioh+spirit+caller+rom PDF link annotation
    • https://portalkucharski.pl/app/webroot/media/files/75143757732.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/67948088108.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/dolomunatuwowipagep.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/94864852652.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/salezaxopu.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/ropizinuxijifozawox.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/22800626264.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/96772184334.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/novilipexo.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/kepusotom.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/75649856700.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/48381269698.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109011150569131.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ogilomekixopupajigenoj.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/pezefexokuruli.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/xulatazarixosu.pdfIn PDF document text
    • http://generaldistco.com/images/file/21200153296.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/nopanupojo.pdfIn PDF document text
    • https://discovery99.com/userfiles/file/misebidofoxifufitizub.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/94032346672.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/4212075252.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/kezevigigume.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_off0000cf17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72E 10800 bytes
SHA-256: afa6f6061bbdf7889b5646fd6ed4134ec512797bb2947ae4bbf9012e667a5e2c
font_02_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 19240 bytes
SHA-256: 3c2c635b742d8a81672c9a203ce6ad84c23f148e81d6b2baff3d5ad5daca8e2f

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