Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c475e19adff25c…

MALICIOUS

PDF

84.3 KB Created: 2021-09-09 09:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 669078be759f14bf66311cc15a88b221 SHA-1: 9c8a1288b210e88bc6c85e6e28626f7a56a2837c SHA-256: 60c475e19adff25c19548d663cdbc691a1a8315c77fe1beaa6395c6b6cc352d8
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick the user into downloading an encrypted payload, likely by providing a password separately. The numerous external URLs, many hosted on compromised WordPress sites or disposable domains, further support the role of this PDF as a downloader or part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=app+usage+apk PDF link annotation
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139198727751---15033842701.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/7fd51bee7b1fdc836db8fa259690dbb1/2506486695.pdfIn PDF document text
    • http://sung1.com/upload/files/16912040479.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161357b5195a2e---mabedalanowoveri.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/10537296163.pdfIn PDF document text
    • http://octapus.vn/images/uploads/files/43952571439.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/xoguraxe.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/3676682e32c22a88aed9ef236ace13ca/lipoxis.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/volofota.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/69649938098.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/wazirinokamaf.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/ganufabimitesubidiz.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/32528063080.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/71771200596.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/40443459616.pdfIn PDF document text
    • https://somogyplusz.hu/files/24014004070.pdfIn PDF document text
    • https://clinicscrm.com/img/files/setazekarexojodap.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/bunoweziposixapigud.pdfIn PDF document text
    • http://cochemical.com/upload/files/vuxupeperoferapopofu.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/54597340341.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/wenegemijaw.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/57802888056.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/71901388590.pdfIn PDF document text
    • 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_off0000e2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 10040 bytes
SHA-256: fab46e4b6f5c5fe87b6afdcba82a52a218cbd27e2c41b7efa58dfdbddbbaef9a
font_02_sfnt_off00011181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11181 19276 bytes
SHA-256: 099576e74b5a2f95d1696ed8ee08ef06da05a401536ef966236ba9f9b8b8fbcb

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