Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7523f746913ce62…

MALICIOUS

PDF

90.1 KB Created: 2021-09-17 11:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 210002e26040caa47575333ee6588a4c SHA-1: 9a3b68b8ef3d32007ea80de22a777893ef10ca87 SHA-256: e7523f746913ce62c3f9411219d54c1c624cb109afb55b0e280d07648eebd73a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, numerous external URIs were found, many of which point to PDF files hosted on potentially compromised or disposable domains, suggesting a link farm designed to distribute further malware or lead to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • 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://h16hr15k-h19hr37urn.com/contents/files/sapobojurugarud.pdf In PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/c2e04080525120ae09e683d0a733cbb0/96747030054.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/bagumuxoz.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138599ad6637---bojakasisusilup.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/54123228708.pdfIn PDF document text
    • http://rilta.net/userfiles/files/28197534704.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/zolegakevuvifuw.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/saduriset.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/75104318284.pdfIn PDF document text
    • https://suacuasathcm.com/uploads/files/60896431830.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/duxesewesadinesitajane.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///vosep.pdfIn PDF document text
    • http://gr-chem.com/upload/files/76801716690.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/guluroteginos.pdfIn PDF document text
    • https://2b3la571ga-70p.com/contents/files/zotawidezixovusat.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/pilanojidowaxok.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/fujisigikogamowoxutizuka.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/77537321275.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161444ff2783b3---xelofawo.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/92017090790.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/45592771558.pdfIn PDF document text
    • http://darangyi.com/userData/board/file/sukexemojolamugomi.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/lqdtqfke292nf8vnk72f9c1od0/90096427221.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/15af0e413aa57a50a9005eefc1027e5b/31641758441.pdfIn PDF document text
    • https://mikludava.lt/images/files/ruriborifir.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/jinozejedegivira.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/nuzodaf.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/volanalusudodirod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=call+of+duty+mobile+apk+compressedPDF 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_off0000f7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F1 11156 bytes
SHA-256: bd79d88790581e75bc8e00e4ea4e448be3e7f53bcb2220b50946e44c3de327c0
font_01_sfnt_off000111e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E6 18624 bytes
SHA-256: 9e9b148a3a0732b9ba349ba2df6abd09565fc2fc7be89b7ef3ae07153da1dd8f
font_02_sfnt_off00014208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14208 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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