Malicious PDF — malware analysis report

Static analysis result for SHA-256 024f8c3b8d5d0798…

MALICIOUS

PDF

83.9 KB Created: 2021-10-06 03:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 47eb6331eae050d53eacb9fd57870ce2 SHA-1: 294a2bad12bc29e6016dfe7dadcc0f776d967469 SHA-256: 024f8c3b8d5d079824097404cb5bdb3266fc984ae3140772b270259076bb7ba6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to lure users into clicking malicious links, often delivered via spearphishing attachments.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pixomot.ru/uplcv?utm_term=the+power+of+public+speaking PDF link annotation
    • http://ifap.it/images/file/24473975224.pdfIn PDF document text
    • http://offokin.ru/sites/default/files/file/65501429460.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/16802927809.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/72966149283.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a914bbc089---51273953051.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/25772748972.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/41357770041.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/dadokabotipadafejena.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/nuparabusezorof.pdfIn PDF document text
    • http://freeski.hu/freeski/file/banofemiduzabowapavim.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614de6dacec36---widedilenisuvako.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/savebasule.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/topemokudiguriti.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/jimik.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/53791188608.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158168db51f4---suvovumuligogajorevag.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/naretip.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/newugiziwonakiroxosip.pdfIn PDF document text
    • https://linker.tw/files/83409215658.pdfIn PDF document text
    • https://mihalex.by/files/files/zaxovabawodowivuvuvavoko.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/9181647686.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1632682245.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/fotogogof.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_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 11044 bytes
SHA-256: 6d0e1a56a7bcea62bfcf793a6b5e2d25b95404f4bc0dd431a5e5e521c581c767
font_02_sfnt_off000116e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E8 16548 bytes
SHA-256: 43070d3a1d06dfd1103f329dd324b0cdea1b7a4bb10d8c460ffd407978a83232

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