Malicious PDF — malware analysis report

Static analysis result for SHA-256 6855e4af864aeac3…

MALICIOUS

PDF

85.9 KB Created: 2021-08-16 03:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4f893820e1fa92e13feeaa74e45ffd07 SHA-1: dd53fa20e6732f215000d50029595bbb673a8f6b SHA-256: 6855e4af864aeac37c69e36bf800aa5885e4fb9186573e0130efd3e70c5de803
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a payment redirection lure, attempting to trick users into sending funds to fraudulent accounts. Embedded JavaScript streams suggest potential for further malicious actions, such as downloading additional payloads or redirecting the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/dlt2v6rr1smpr24tqqh9ujfs7u/lutufinuvodegifufojag.pdf In PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607314d857bda---23552298697.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/6564278c6c177978a0e9ea611466f35f/64722534208.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/31588785624.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/0194995ab044a8f95e7150fe91f3db15/43465120738.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc343ad472---wajonosaxuvudokosidomagu.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/golodimururenoxebutuselaw.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/pekimetoporasojuzemuka.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/kiregemomavigoxibater.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609be5cfa12c1---pofuwu.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/45476905572.pdfIn PDF document text
    • https://room12shio4.com/contents//files/famezakatosazetibugewabon.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/sibapejubodepesimoz.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/80961482697.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/bewulemarinotuzamogukumin.pdfIn PDF document text
    • http://rld-carbon.ru/file/temevemalazixizabud.pdfIn PDF document text
    • http://consade.com/userfiles/file/kekudumabil.pdfIn PDF document text
    • https://inncredel.com/uploads/63862893396.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/20825657014.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/bewive.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/lowiri.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/70263662261.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/ginovezifinafepekudibul.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/mabulibemorimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+unlock+a+zte+tracfone+for+freePDF 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_off0000eb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB73 10400 bytes
SHA-256: 241890f30e53427008ef42994f23134f5639d99ef66ce52f10f55adf9f6952bc
font_01_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 17796 bytes
SHA-256: fa9c188abcac29cb5dac4070d119990079779170701d02b17a4a7b8c1fcef28b
font_02_sfnt_off00013215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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