Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4e07988eb776a9…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 06:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 204a960c8ea8722fef5d72fc60ac35ec SHA-1: b2a158a764f4db91e784fe0fbcaceb60f591c33e SHA-256: 2c4e07988eb776a9187107a4310821b6f51502b95263c74cf3f33d2d20f979ce
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a5fbaa8e0---mobumuxobuvevugasidexa.pdf In PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2aae74bc6---22933143638.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/54070092074.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9fd58cb754---xexegaxavarudigenotewexo.pdfIn PDF document text
    • http://polletnv.be/uploads/files/4267200395.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b363d8c06---zomivuzeroripi.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/nikexi.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160834470723ab---jidafaxunufebupas.pdfIn PDF document text
    • https://filetorme.com/upload/files/dizozusowe.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/pesofigubi.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/3689e132407088d2f3e54b6751891157/29899289413.pdfIn PDF document text
    • https://clubon.top/uploads/files/96132897531.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/59373588906.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babe4e50452---3720530981.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824bf87b658---tapezano.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/hp3ogrgj7mbgvjdn4hnd57h5h2/jaxogap.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e8720680a618a74de84ee0934fc75cdc/95061239050.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/78010167681.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096c64beb951---wibogologebexuxejo.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/mejixe.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1e64352cae3bb913d92c8816283bd50f/63538753051.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/83960129112.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/putunojifaj.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/h3igcansrb3ia9ei7b08fmd305/53460919087.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/lonofefisago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=taiz+and+zeiger+6th+edition+pdf+free+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 17676 bytes
SHA-256: bc6e04068a0c6d78c78d085709e9a847c577b03167a4400b960629cc0efe66dc
font_01_sfnt_off00010ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BE 10884 bytes
SHA-256: bcb80c480204092e8c08a3eddc99eb5269468c4c5c76ffbf19afbee88d0841e7

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