Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bacebc258204344…

MALICIOUS

PDF

71.0 KB Created: 2021-09-10 08:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: 086092c9c47b016c014e7622ff5fe65f SHA-1: 1ad891151845abf0fb4c5bc8c08459cb8d9a48ac SHA-256: 0bacebc258204344876600753071b16d512dac0860443277637671a350e44743
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://inwebjor.ru/uplcv?utm_term=minecraft+pocket+edition+sonic PDF link annotation
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/3886c785460a0bc1434eece53b244786/22808449604.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/wexuvaj.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202109/1630801700.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/31593030304.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/30183526158.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/dewukuxemakadol.pdfIn PDF document text
    • http://taixingchem.com/uploadfile/file/20210903041228860.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/pepesofedix.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/kulojugitekig.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/89096938703.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/julipumuxovomusekajelo.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210903_0BAF3EC7B48DEED9.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/44719948885.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/nanideli.pdfIn PDF document text
    • http://chineseclothingonline.net/File/20962731370.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/wovutakogufulabalos.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/23843085611.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/70392095492.pdfIn PDF document text
    • http://upakuika.com/img/file/mukajone.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/wimej.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/wozefuwupofitiji.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a84d57a889---67884633809.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/wexopiladu.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/96338181298.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB9 15524 bytes
SHA-256: 73e1fbbf99da37dbd1f6580cefc6442f130ee017300582197eb26278f8735b26
font_02_sfnt_off0000f60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60B 10652 bytes
SHA-256: dd49a2571311f78dfceafdcf98fefb89a39c54e02256f13164e19646fad65585

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