Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78625790e7e6614…

MALICIOUS

PDF

76.5 KB Created: 2021-09-14 13:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8fe6bcd9bfddf80ce493bfa294d9fc02 SHA-1: 7b8bee6c4c67fa31d380e02c3af0e5a33638fced SHA-256: c78625790e7e6614310d95a7317997a697b3c7ffbebd0e5f3c325d8998a20fad
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and multiple external links, many pointing to compromised websites or disposable hosting. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM indicate a link farm designed to obscure malicious URLs. The embedded JavaScript likely facilitates the download and execution of a secondary payload, as suggested by the ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://smidgel.ru/uplcv?utm_term=download+app+inventor+for+android PDF link annotation
    • http://www.siscbolivia.com/admin/uploaded/fck/file/65091123692.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///vovegugafigaz.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/56223694609.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613142772d96f---mosewumesoxe.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/kawikezilirizi.pdfIn PDF document text
    • http://ktai.lmg.jp/upload/file/56705742493.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/b669121a825895f003ae33df3713f9c4/66229474544.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/89663712475.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/wapove.pdfIn PDF document text
    • https://vendax.ro/files/file/99012060590.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/bakopukokevepujixe.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/lokinebevunez.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/xamisanividijulu.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/dowarokagamevejirarepozix.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/jelosomubenokuxuvisap.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f95c48c4a8---5349928132.pdfIn PDF document text
    • http://cloverdiamond.com/file/barezudidubenupuxovapo.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210905_F78609975343499F.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/17055750135.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f06cecf45e3ef973de564699b1d3c0e7/84301090333.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/fidedisatuje.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/73549494271.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/39366127868.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/61467602596.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/2984c2d01c0ac3e74758aefbbb0e03b2/xalepafopaxa.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_off0000c7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A2 10476 bytes
SHA-256: 963803b79cd9df56c2b781661f201ed2750648daeec7466e4c1c348df59997d2
font_01_sfnt_off0000df90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A2 17308 bytes
SHA-256: 3511d394d36705fd3c5eafc2a46ffac1560acdcbbcc19f2a0143f09b4f81298b

Open this report in the interactive analyzer, or submit your own file for analysis.