Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fea84f2827defaa…

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 23:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f983690ca7633c17d00681c52fec3e02 SHA-1: 1dfabcdf89a1ac9e5547e02a66e3f1acc3d2bc6b SHA-256: 6fea84f2827defaa86f150a892ef52520bd8a108201c6e8c80cbfaa9811cfeb8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and form a link farm, a common tactic for phishing or redirecting users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://americasbestwingspa.iorderfoods.com/uploads/files/35014494241.pdf In PDF document text
    • http://righetti-ticozzi.it/userfiles/files/32408154330.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///kafiduzirelezeroporonuxi.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/48545125508.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/23228866156.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/xopozutizixowedofajo.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613fde8f52ed9---walazu.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/jupasinu.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/72677469496.pdfIn PDF document text
    • https://magerp.org/upload/files/30241594199.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/21408476133.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/76543143561.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/45199475095.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/gaweminevodep.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/bokifopujofutuganenisega.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/ludenutemawus.pdfIn PDF document text
    • http://anindecor.pl/files/file/62744932796.pdfIn PDF document text
    • https://granitnet.hu/editor_up/38703769178.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/tovevezelitazafif.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/sigofebu.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16144b344e22f0---rafepufeluzimoje.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/domum.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/gojogobojikujote.pdfIn PDF document text
    • http://knauto.com/upload/file///busixulotavejamivejowodo.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/xirikimafab.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/66946789127.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gson+java+to+jsonPDF 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_off0000b403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB403 9968 bytes
SHA-256: 8bb0730d5a7b44a6e325817af86008f45dbdc3944c4920c47b55da392f8172cb
font_01_sfnt_off0000ca48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 14560 bytes
SHA-256: 768a3a74e4a722647926a156fb1d738fcc12844d721bbc7a7ecaaba24279aeb4