Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3302f4227f10151…

MALICIOUS

PDF

80.3 KB Created: 2021-06-26 19:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9a1cf4f0ac60ac5a61ada9bb2eb9c609 SHA-1: 90dc3228fd10b5bb164a3248e535abfdbf00bc0f SHA-256: a3302f4227f101510e542965b08acec4dcdf88731dad1a860fc1ba24e660d816
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, employing a link farm strategy to direct users to potentially compromised websites. The presence of numerous URLs, many hosted on compromised CMS uploads or disposable domains, strongly suggests an attempt to distribute malicious content or conduct phishing operations. The ML classifier and ClamAV detection further corroborate its malicious nature, indicating it is likely a phishing or trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://mppscstudy.com/admin/usercontent/file/5296692123.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098b623d76fd---watelugafepepon.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/wumunivanegikawovusaxiwi.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/weret.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98ae6e82cc---37050425162.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/45510970733.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf4c863544---95255252991.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/bisaporabapanabasa.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210607022445.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4b4b47ad---40450971958.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/a233bb0ea68ed838492bce5fd31397bd/xepiwomonezagiro.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/lemilunufixuxujuboxowuze.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608073945ccee---lokorixus.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cedf5686cb8---mimijawaxelamaxeja.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/17ac00283cfcfca82e457f963e64955a/45097067622.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5753f87733---88683045001.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/velisogipixol.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/f44863daee0822fd1795a8186807dbf0/89348559237.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/gerogosenuvegexaxekusale.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/jefadafajanilewe.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/51175723184.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160823741012c8---devabaloxa.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160918d8cdc489---71600873012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+jack+giant+slayer+full+movie+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 11476 bytes
SHA-256: dcc7cc31dc2452f77572e3a405825695a4a46026efdc97fc9dd4f9118053c39a
font_02_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 16940 bytes
SHA-256: 0622d5e853b19605a696fa52fc4110ea4e59716d54e9aaf4c0a2bd6c70424065

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