Malicious PDF — malware analysis report

Static analysis result for SHA-256 7891cf5a4c7c03d5…

MALICIOUS

PDF

75.8 KB Created: 2021-09-08 16:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 23e24d3abdee9441a732661d31883d99 SHA-1: 1656988abe33190f98b2512092b5c66e0155e250 SHA-256: 7891cf5a4c7c03d5e8931aacef555da31ec378f25a9639d7f59ccd3e8b4d701f
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 0.9948

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://ozora.schaffsen.com/contents/file/34297807897.pdf In PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/ditosozafugorapigoxozubog.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/tepufumopozevufib.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/wubisogatuxuwonokodow.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/202192848589609.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/10502200967.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/pozupemenonupuzulopuxor.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/zezigu.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/gazobetumumagejorosisapi.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/nowerifegixarivaberulek.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/vojupumevosopew.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/jujegoroleroduxogoxivo.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/sipunebajafaruvotul.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/54864118355.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/bnv6ot837nlcidh5hsabtl694u/riniw.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/66929937522.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/21205743416137167b229ed.pdfIn PDF document text
    • https://brs.jo/userfiles/files/70893870590.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/dideso.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/2331184604.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/senex.pdfIn PDF document text
    • http://xfswchem.com/upload/files/53914686106.pdfIn PDF document text
    • http://video-cycling.de/files/file/godolezunupisakot.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/fegunazuruxuxomeme.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=tipos+de+empalmes+de+cables+electricos+pdfPDF 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_off0000c187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC187 18164 bytes
SHA-256: b3166c0ea736fc9b35eb4311e6236c852fa25f75609b1409820ec59b7018439e
font_01_sfnt_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 10780 bytes
SHA-256: e6cd9b4b63bfdc994d3c06c00f9dd541a028f1f6e500ddec9ce99194999d0271
font_02_sfnt_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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