Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f79c3af6878d9f1…

MALICIOUS

PDF

71.6 KB Created: 2021-09-26 20:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9bc2bacf88b85fa7e93c7a6a02bea4fb SHA-1: aa5d7169706b00485573b7bf149dfdb99bcc91a8 SHA-256: 9f79c3af6878d9f1fb8166ad9e4870b75cdd965a22197916e0264f0ee1b361ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and links to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://pistant.ru/uplcv?utm_term=see+private+instagram+profiles+online PDF link annotation
    • https://angkalaris.com/contents/files/6234909356.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/33353473594.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/padedenuv.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16149b2045a630---22686628551.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/tutesev.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/60250216838.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135449a4b18d---21112455694.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613faa6c93841---kebonoxikurez.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/39715759352.pdfIn PDF document text
    • http://congtyvima.com/images/Download/gopawojanetudeg.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613646f817313---rezasagur.pdfIn PDF document text
    • http://chayka-svg.ru/files/dogidu.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d87c6e2960---kixiwaviputup.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/rakefibibezafi.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/vidoxijigesalunilej.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/zotilizesukubusosison.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/tidezerovapexazukota.pdfIn PDF document text
    • http://zamgph.com/uploads/file/180926079199.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/33021255006.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/48779461078.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/fepebevutefijeredobuxobed.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/gujofomupirimaresobew.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/14259498141.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/db241h9bpeo4e5jithrs2bk0n6/27014252581.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/30895693784.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_off0000b1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F0 10840 bytes
SHA-256: 68dd42693194f26fc7df3ef2a8d27b049d690964c6dd8c67b231abe9d00d67a6
font_01_sfnt_off0000caed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAED 17624 bytes
SHA-256: 783ab5f7cd63c15329ddf01cd8081b9e1e051f1cedbd2241bfecf005ea5ee3a6
font_02_sfnt_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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