Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b1027cb1a94194…

MALICIOUS

PDF

81.8 KB Created: 2021-10-08 02:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6bb9e7fc2b638a2598e57008fadd1c62 SHA-1: c2134f3604328fad668f52f4724341a3553b43a3 SHA-256: 84b1027cb1a94194baaf3a2a2cda4e8ad036bc8723ffa28c873dfc64afafc8dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm or redirection mechanism to distribute malicious content. The PDF structure and the presence of external URIs strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=would+would+you+rather PDF link annotation
    • http://daisytalavera.com/userfiles/files/jixatem.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/devaxugatak.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/pixetenivumevoxog.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/97681206378.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/35446040822.pdfIn PDF document text
    • https://begili.com/uploads/image/files/58542366719.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/wobivonerubowo.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/37274314338.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/gixurefowobimulawenati.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/37025672254.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/pelajaxativosutal.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/81150162981.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/rivaziruropikilimapegude.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-28/20210928225158332419.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/11840867834.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/88143391614.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/77129119941.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/davif.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16145a1f52839a---49509696673.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/faxuvikadalu.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/bixuku.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/jopuvurozera.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/wesigijaperite.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/gurilobotixobi.pdfIn PDF document text
    • https://reniuved.it/file/rupigijib.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/jagikulibegave.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/pidiniwulixudulunerofofa.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/vofigodajufevotavorokikor.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_off0000ddf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF602 16804 bytes
SHA-256: b3dea4c14f1edfc775c2c1579cb10c38234ace515563a7e6c0290264deb70f45
font_02_sfnt_off000121bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BB 10276 bytes
SHA-256: b6f623e6e345cc3a5cc30f0509c8664667df2cc9af95a518ce987514ee6e83a2