Malicious PDF — malware analysis report

Static analysis result for SHA-256 0404d5a291ee7bfb…

MALICIOUS

PDF

96.2 KB Created: 2021-06-30 15:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4f0eb4f281dc56292ec0e584216867b1 SHA-1: 19105923a3d7fe35d6c0b401db676af3a98cd612 SHA-256: 0404d5a291ee7bfb00c05dbaeb7460ac9ad557ef97401c6bb30863d96b340f0d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of links pointing to compromised CMS uploads, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware delivery vehicle. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160812097eed00---53836699239.pdf In PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/68763b45868e4cd13df8afd01b3d1410/9545434898.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076e530d3726---sunoreb.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/dnj2s3vlnbm0ufci7a27265hiq/79405055454.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609455270fe03---noguvajososenu.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc69bfd45---tegadexujazi.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/fsk76fpo96el6l41q43r4ti9u0/80623779707.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/15830623102.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59943be330---43522363978.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/paneqmod576iqfagqatk34v65n/matonefoza.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6da8d1b1b2fdbbac15678ec6a7d5231a/tejafo.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/semalapokaditiw.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/hct9dqusgag9naafrdmj3ec401/zoguzazesutonuwevefod.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4e431a0f9b684c83aa695b420c2b9df1/jewifuxu.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/73881361294.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/fc6f6723cc68528d0ce4af08e5eb633d/runat.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0975727da57ec27b5ab26f1819d6b8ce/dupulafof.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/lutazu.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef50900f86---80310298678.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/1fb13aa2f4ff6e14b3525e3853e05efe/pixiduxob.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/eca00705ad9679ddd974952df5f4992d/telitifolopetalanisulu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f346350d20---soloxanozijenuneti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=tell+more+about+yourself+answerPDF 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_off000113fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FC 10684 bytes
SHA-256: 59b0116b3ea984dd7387ab75314083e585bdd73e938f9ffc825b4ebf29f1688d
font_01_sfnt_off00012c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C98 17412 bytes
SHA-256: 5223f901ab715e692e87dc9773bbd0b4e9b6f7a9b095ea65519f67797eebefc3
font_02_sfnt_off000159d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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