Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bbe54ea49f439f…

MALICIOUS

PDF

100.6 KB Created: 2021-07-31 11:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 242a65a04e5e8775effb3385e8fa4b6c SHA-1: 8184f12a7bdc856968c60f9748c43b0d29acda3f SHA-256: 46bbe54ea49f439fd403edbb9e5646eb2d44a7587cdac2b5fb7a3e5d3cd1197a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users through these links, likely to a phishing site or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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 https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/hbsvirqn5bs090d7bnm7ueenpq/vulik.pdf In PDF document text
    • http://jorakaygame.com/ckfinder/userfiles/files/zarapajolusekusarasapa.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cff1749a2---fisigefesuketezera.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/vovodomojewojuxomemim.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/fudesagefiwavarizitiji.pdfIn PDF document text
    • http://4bx.pl/public/file/xilaretedoxubolevek.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/58288158659.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083072e357af---tiwuxatajudoref.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/b4a769f2c33684b4004c265fdd2b98fc/durufetelotiweloxilut.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d93c7028891---dibinolipesoxujajubiv.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/23491008676.pdfIn PDF document text
    • https://ancoraeducacion.com/images/bixupokuxur.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3294671635---10931869420.pdfIn PDF document text
    • https://fultoys.com/userfiles/34652168789.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/74774eb2b932a0e15142576228562d89/nomuzusodenizopi.pdfIn PDF document text
    • http://dges.in/userfiles/file/20473964108.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/d7cvvcp41c93ak8ggtvg2u63t3/16633081448.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8669ecf8a23674344f8cd6ba9585fb11/fiwakapulasawuba.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/894b015c887751efebe74e3a7c4d1b4d/52183427490.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210518024450_0x3d1m.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d20eca7ced---75856916506.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/darujofijumuvune.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c69e57a4e3a---juvakujowirakufugibifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=shurflo+4008+rv+revolution+bypass+pump+manualPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 14856 bytes
SHA-256: 62b859dee5e32ad9d2fa63776a413b422dbf01959fc329c29144e3c06a5125f5
font_01_sfnt_off000107de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DE 17920 bytes
SHA-256: f83ad5f3f18426c6ef2a268c78f71860270d9c603af43e62fdf527eb86fbe1ac
font_02_sfnt_off0001375a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F6B 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_04_sfnt_off000164e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164E5 11524 bytes
SHA-256: aabd79e91f9c1f1208b34f7009840a3925a8037a39f624cdc4555c769a974303

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