Malicious PDF — malware analysis report

Static analysis result for SHA-256 647e2e8d630c4030…

MALICIOUS

PDF

81.6 KB Created: 2021-09-16 20:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 00d5f830fc19332e75edb5d21599e5d9 SHA-1: 73f2d41fe2a9e731a4b3f586101ab1f981625935 SHA-256: 647e2e8d630c4030a350ad18af515b4eac531104608a6316bbf1541022442092
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous embedded URLs, many pointing to suspicious domains, suggesting it's designed to redirect users to malicious sites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links on disposable hosting, a common tactic for SEO poisoning or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://xinpayflow.com/ckfinder/userfiles/files/lopulapijoduxag.pdf In PDF document text
    • http://orderkai.com/uploads/files/91495827977.pdfIn PDF document text
    • http://ossokahve.com/upload/file/surigenepitu.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1630704721.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/59129109694.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/xemizujuxenutox.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/82208286516.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/linanalusevusowanasebub.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/wirazafafek.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/metarom.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/38573710740.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/wenuvogefalodekiz.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/sitevumarakoles.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210913_5822F4FCDD34686F.pdfIn PDF document text
    • https://ysh.my/userfiles/file/muboxasogumowizesana.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/molikuwifoxon.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/75825847775.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/vanoniwotolepinumepunuzej.pdfIn PDF document text
    • http://infunplastic.com/d/files/98275296171.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/45931168671.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0d6f4dc301cc01e983f9c1d3fba6528e/losopunelugiw.pdfIn PDF document text
    • http://goref.ru/files/file/13761034060.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/gerafijodakekav.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/79444855162.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16130944446b2a---51686084468.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/720c084b7419b593ac58ef35cde33610/7358876500.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mumbai+saga+full+movie+online+hdPDF 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_off0000db41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB41 17300 bytes
SHA-256: 4ffcd9b48ff70ed099771de887bdbad612fd25ff4e478f7e77475c381b26de2e
font_01_sfnt_off00010784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10784 10904 bytes
SHA-256: b6c777ae2eed0a0b28dcb1b700f78a40aafe3adb41968f117891813198aaa105
font_02_sfnt_off00012057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12057 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1