Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bb65e671c035b2…

MALICIOUS

PDF

80.8 KB Created: 2021-09-22 21:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1c1838c8ba2624901de920bb8a29fdd3 SHA-1: 3f50256a9e1a407bf173f0daa8858b45bb057e02 SHA-256: d2bb65e671c035b2be72b6d560587f148454e3ba1fe6fc46ef8a8b5d4cb5fa96
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. The 'SE_CALLBACK_LURE' heuristic further suggests a phishing or tech-support scam pretext. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://atsrealtyvietnam.com/upload/files/nasojetitaxig.pdf In PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/lewabuwufunudakutegib.pdfIn PDF document text
    • https://maviet.vn/upload/files/23899718907.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/38326880369.pdfIn PDF document text
    • https://anaksemut.com/contents/files/31752187735.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b620b66406---51730962080.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/pawepebapisavalenan.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/jovaradedi.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136fa7d8610e---pigulapigosezobuf.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/jupufowimukufemaginege.pdfIn PDF document text
    • https://baptistfriends.org/media/45573099981.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/gavotimijigexopopebu.pdfIn PDF document text
    • https://dampinggame.com/calisma2/files/uploads/31196327589.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/mugupibawalefelutawolozuz.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/45739601023.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/32569067672.pdfIn PDF document text
    • https://datenglagi.com/contents/files/43740103767.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/bopefajuwebabodozixez.pdfIn PDF document text
    • http://www.2m-france.com/img/uploaded/file/lubilanazasu.pdfIn PDF document text
    • http://citranco.com/users/files/85821353011.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109141646084762.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/90386401612.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16134aa3640c6f---gotegozujatutijabevotum.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143dd7166f89---32874074625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+can+i+unroot+my+rooted+phonePDF 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_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 17284 bytes
SHA-256: dcec977421ad40b845234a9744322a93c8a21705eecb9f92f2ff960b59683280
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 10856 bytes
SHA-256: 70039adeda5de0c2b83ddfe21f4f4eace8e2c8c32bc27eded29c285a3045f6f2
font_02_sfnt_off00011d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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