Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d74e934f7a5e24…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 13:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e0272865d153ec776cdc34c137775124 SHA-1: 2d3bf70af27a05a5f7b0cbf648978778b727c11b SHA-256: d0d74e934f7a5e2445d94c7626f4a2202ae7ee5755358278ec5914da78192f38
224 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a callback phishing lure, instructing the user to call a number or download a password-protected archive. Embedded JavaScript streams and numerous external links, some pointing to compromised CMS upload directories, suggest an attempt to deliver a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/6e0b4181393a7baac98c29764e26bfc2/963271156.pdf In PDF document text
    • http://kfbma.org/files/fck/file/libusimekekerifod.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/18429028867.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109151011377829.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/pepupeze.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/578442275.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109110919299432.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/35411768948.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/69159994632.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/29199600048.pdfIn PDF document text
    • https://banghenails.com/upload/file/lobefavizabujuf.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16144bfc557c98---34828794798.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/62035327624.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/xejifiditalubonisuv.pdfIn PDF document text
    • https://reniuved.it/file/gutixatubodakekobakorek.pdfIn PDF document text
    • http://opsir.eu/files/file/ridatotiwaguj.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/xovidapedixinofurubiga.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/duwumesufig.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/rakilanezujuxo.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-16-09-14-58-65.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/62591276373.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/oovvejo2iin16a4md2lgp3bs30/varavipefivu.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/87678990406.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=esconder+album+de+fotos+androidPDF 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_off0000d1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A2 10860 bytes
SHA-256: ccef409ac643b7d8a721ce42bb5ab177c4f8ce19341fd4aa0c18aa1739a20dce
font_01_sfnt_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 17508 bytes
SHA-256: c30860dab79051c889983d4d3f00cf2640c842a78747a2a6a456b6c0d6ad2b5a
font_02_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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