Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58a14133979e640…

MALICIOUS

PDF

86.7 KB Created: 2021-06-20 18:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: baacc6dfbe0b18a70b68e937a8d95ce5 SHA-1: 4405eac49fdc1f2941079751584a8849600328b6 SHA-256: f58a14133979e64089a01ba3f83b5d88ad9fe813b162a8916d6d95e07c8c7ec1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content or phish users. The presence of a search term for 'super mario 64 ds apk download' indicates a lure to entice users to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b56a63b5f8f---49774049594.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160883a67e23e6---84873678063.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6e0be7914---muguvipa.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945fe7242d7---83326954846.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d963459213---90507734133.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/50241725363.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd497753cd---pibabuzemox.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/14474798209.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/sijafajotikosemavimibozap.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a62282ffb3---94181891078.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c4e25cdf5---29941009552.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/fupumipejivodoranabaxuxu.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/wetilifuku.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/105aeab949a2ff06575d738046fe19c4/wevoberan.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/594sbueaeu3ojv2ktgd0kfo5kj/bomed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=super+mario+64+ds+apk+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA6 11168 bytes
SHA-256: bb12b11db0ac91a62c83e43b33057266279cfa29c57cd6106c05dc22e9fb169f
font_01_sfnt_off000110e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E1 5604 bytes
SHA-256: 60393591f60d9bb8fd5976c242888e6718cbd4cb0e74bb4dbec57854a26a35b6
font_02_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 12216 bytes
SHA-256: fe4149a4a189f56b5e41979ce8d0d4f3bee1c2bb0232f66855662228e1141045