Malicious PDF — malware analysis report

Static analysis result for SHA-256 3014a9649ff947d9…

MALICIOUS

PDF

79.7 KB Created: 2021-09-18 01:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2e8d3e5e601a2740ae0f2a9b47197801 SHA-1: ed0440a18182109a5eddee37c956b4452f9ba9d3 SHA-256: 3014a9649ff947d9180f5afd73eb47277d17820805677d96a3a865fe379f865c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, which is characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and the presence of many URLs suggest it's designed to lure users to malicious sites, likely as a first stage in a broader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://smidgel.ru/uplcv?utm_term=what+is+the+collective+noun+of+teachers PDF link annotation
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/bonog.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/24535130607.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c1784ecf55019508300524ad72f3fa37/borunofo.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/sizonipan.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/61608000878.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/9951647656.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/52937815764.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/6355589118.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/lulajawibilusok.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/gamobarorulixesuzi.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/bumabutunodovatenukubi.pdfIn PDF document text
    • http://nuuts.mn/uploads/assets/xazoz.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/tetujabo.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210916_66C28FE282D93DDF.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/sopitipodepagaj.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/tabijap.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/99256935896.pdfIn PDF document text
    • http://dgkno.cn/upload/73725178821.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/ritorusug.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/kesekemupusawunef.pdfIn PDF document text
    • http://4rrecycle.com/files/file/kijijugifo.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65952427436.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/81540956517.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/piwowujebezapotufesu.pdfIn PDF document text
    • http://seamacros.com/upload/file/todolemikare.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/gelugitaloretafutitojitu.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_off0000d4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F2 10592 bytes
SHA-256: 2e7524f333e94fd513330c54d1ccbcbebb9cd45d086bd944cc490a1af5f372dd
font_01_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 17028 bytes
SHA-256: ea3d4b1aa694bb785389c2004a8335c809e5719414a870b21f3c6b8163ceb700