Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03bcade876845a8…

MALICIOUS

PDF

78.6 KB Created: 2021-09-25 00:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01ac8c1ea58ff978542006cfe0133ffb SHA-1: a5abd6a66276c60ae730c6e83bca0fa74b5f3282 SHA-256: b03bcade876845a8b42bfe87dd19aa2c092f14132ac518eb53ff46b1ca36d577
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on potentially untrustworthy hosting, suggesting an attempt to direct users to malicious content. The presence of external URIs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://infrive.ru/uplcv?utm_term=clipclaps+cash+for+laughs+apk PDF link annotation
    • https://www.hkha.org/ckfinder/userfiles/files/7058803191.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/39342598178.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161308f532366b---takofesavonuve.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/rujugilesovedipofe.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/wutemusisozavore.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/xebavimo.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/20091029396.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c5781c2ee---pozenibewamafanupajada.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/belosovogewevimimufal.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/d4e543a534c2c304360a721b41a5981f/52038517382.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/dujedumegesomeveg.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/88293874697.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/mopukujanew.pdfIn PDF document text
    • http://chinalabware.es/d/files/xigorimuzawotukolikog.pdfIn PDF document text
    • http://spynet.gr/Administrator/uploads/userpics/OutPostImages/files/vadurize.pdfIn PDF document text
    • http://chinalabware.net/d/files/rovemopejonewizedaxitu.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/fomusojur.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/gelewenekukajerogo.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/tubalabobiziduxupafidoro.pdfIn PDF document text
    • https://pvcmikser.com/upload/files/4016898775.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/63013858570.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/34684138726.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/116f4be9af57ed1c0ed2c66a0c5625c1/nuwijawuxarakepewepaf.pdfIn PDF document text
    • http://medica-brno.com/files/wexamavaloresorupavapebox.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149deb80ba1e---60986033873.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/figasekokawugogaginog.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_off0000c830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC830 10648 bytes
SHA-256: b46cad04e309323b9581458fa5664bfe6b71415296ea21b4b1fb9cda049a0686
font_01_sfnt_off0000e0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 19644 bytes
SHA-256: 0411628523469fbc127f016cfdbb271851c992a92e60ca9a4834917758983c1b
font_02_sfnt_off00011498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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