Malicious PDF — malware analysis report

Static analysis result for SHA-256 e470ba1440dfc6dd…

MALICIOUS

PDF

95.6 KB Created: 2021-09-08 06:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 29a0f6be9335fac5708ad106fa30b3f9 SHA-1: 88519278457e651f0dd40885703ca7ba0f974f73 SHA-256: e470ba1440dfc6dd00625a453c4911d0d7c7e1edd8464e5575315970a8c4622f
116 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be0ee51c07---59447872163.pdf In PDF document text
    • https://cryptobasics.biz/uploads/files/guvafi.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/f8f4fe401ef4a6965018d73e360c568c/jokijuwomamani.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607258b2d793f---wunoxigopafinipitukil.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/sotabaxapurotirewuze.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609fab8b0c635---farinutari.pdfPDF link annotation
    • https://dammesliepas.lv/ckfinder/userfiles/files/45923794245.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/0mj1a3a3lv59n0oej56do53v41/derazoduwejekek.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/59637160964.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/xesemovefolewafanibi.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/lavetexiwudovifig.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/98839741101.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/tenamo.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bogedeninokulejerar.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f31bb9f9dd---zexuwobewevuwo.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752cb24c655---88714564789.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/juwusikikupufivepifojewi.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/rinobowegawiniriwos.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/83927169917.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ab721b8d577---69736771561.pdfIn PDF document text
    • https://ptogel2.com/contents//files/dimasiwelazejemadis.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb40b8e868---kuvupegako.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/lebojifolazebewenujuraka.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/34636133024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=printable+bible+crossword+puzzles+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_off000110e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E3 11000 bytes
SHA-256: 9705a44743ded7eab51941a6101bf1740ec7887555c8a8efed9e357e88aa9ae8
font_01_sfnt_off00012a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6F 17524 bytes
SHA-256: d90e363dde06d9a089958f149c2847421f308fec94090915c0db860013cc563c
font_02_sfnt_off00015804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15804 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1