Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efe2333195ea7b3…

MALICIOUS

PDF

82.7 KB Created: 2021-09-07 21:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d025f18d040b53c0801e0c6484ee02dd SHA-1: 0035cbc8a61ec5bb62986c50e7ad68c72bcb2eb7 SHA-256: 0efe2333195ea7b3a6bb84f587b40dd4c7b7fbec5fcc918f008f25350ab309cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple external URLs, many of which are hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://thebillionbottom.com/business_school/uploads/file/wekud.pdf In PDF document text
    • http://usarsenal.it/userfiles/files/mikijugagofefosegamemo.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/2bcfcf56f824c88d19a034e231e76326/mazixekuxasewaniz.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/96258265605.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/rj7mg7sfb5bt2kgg7k5a2vfva1/45712465756.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/bol0otodc888hem3h26eh7lbhj/pururome.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/51874972237.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085b20202bcf---suvenadilijonezo.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/55377721402.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/44500161652.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47fe4327dc---81221040097.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/gatajukurewixisumebufife.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/suwipadekepasarefozeje.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/a6b8eb020549562180c17b94c02dec85/tokajabigixifor.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/52518967860.pdfIn PDF document text
    • http://www.beverburcht.nl/upload/files/7973982920.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/98688189797.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210803154405_h6gv43.pdfIn PDF document text
    • http://tencanpowder.com/d/files/bosokodigimibamov.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/mugutef.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/gilegoratagak.pdfIn PDF document text
    • http://sun-dr.com/uploads//files/202108120519395694.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/46227396967.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/94635390647.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5311da83b---50012678567.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e171401d8---betoguxu.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/g8qtfd5noj6bgdvolvde3ktj8p/saxijavekovomixubuzirixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ppt+to+pdf+converter+free+download+full+version+with+crackPDF 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_off0000dcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD6 17504 bytes
SHA-256: 97e318d3db9802bce71c3978a9de1a3140748fe0253661c5a5f7469d9d8cda1f
font_01_sfnt_off00010a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A30 11060 bytes
SHA-256: e5f23621e2e67c38d292f2f936a51215cf10875cd1e934b0f13e3fde7b7f883b
font_02_sfnt_off000123fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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