Malicious PDF — malware analysis report

Static analysis result for SHA-256 560bb3d4711bc6f5…

MALICIOUS

PDF

83.5 KB Created: 2021-09-15 15:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2ecf1dce8468094da660bac62fc373ac SHA-1: 85767c44d1a0131c3df6265fc0736eac2e1a307e SHA-256: 560bb3d4711bc6f5d98e4920a4798fccd7b3fa62b97d19d88ede95505a557c16
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content or redirecting users to phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown URLs suggest an attempt to obscure the final destination, likely a phishing page or malware download. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://szolnokepul.hu/userfiles/file/jafugajobakiniwusuna.pdf In PDF document text
    • http://secoinblock.com/upload/files/90777699209.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/faxuleremajujosomewat.pdfIn PDF document text
    • http://www.pvvc.cz/files/jogex.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/67661105166.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/bexabukosugolipozaza.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/dorupaxilinodijizaw.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/lemilavatiduluro.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/rapatezifewo.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/0e33e631a394e85c72b451314937b5c1/37680288078.pdfIn PDF document text
    • http://smirna.pl/files/file/zonelo.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/kavomul.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/xorurokerekokifefega.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/65092530557.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/dotegukaw.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/fuvejupu.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/74521549957.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/44937047107.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/20729119170.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/jizolo.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/bolowo.pdfIn PDF document text
    • https://posetili.ru/userfiles/file/lapoxagawet.pdfIn PDF document text
    • http://kcpsystem.com/userData/board/file/bitokij.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/64261362958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=free+redeem+code+league+of+legends+2020PDF 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_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 17656 bytes
SHA-256: b732ec85e7fcab6c03b208155202c571e4c9503a2fe4d1c98adfdb3f9a7c5cf4
font_01_sfnt_off00010f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12721 10948 bytes
SHA-256: 0776c4b47c6e11512d0e78a920a5ffed2da5b3c434363a986b4fa8bb09291662

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