Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53220b5cba43822…

MALICIOUS

PDF

91.4 KB Created: 2021-09-14 12:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 00020e2099d2fb19e2400ea0d1e0150b SHA-1: 78ef10f1df7c676c7846cd4e11c3d90ad646d265 SHA-256: f53220b5cba4382270ce077a44ff572b46922e6a5609834a7a4faa042b555f75
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://pixomot.ru/uplcv?utm_term=free+full+new+movies+2020 PDF link annotation
    • http://com123.vn/uploads/file/farokijetok.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/89945233240.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/jufafekosokif.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/935cd9f22ba0971cf777c02a0d472763/1838982889.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/33362692531.pdfIn PDF document text
    • https://polytex.de/sites/default/files/detelevafijubi.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/xezitebusuxoganimabujejo.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/54741448836.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613adf97791b9---36425580338.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/jubukolotaxalijoruweguji.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/karekuwofesik.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/bejedidunixi.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/21743850132.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/79054652473.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/8428079169.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613665891a12f---95242001345.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/89547977370.pdfIn PDF document text
    • https://attack.lt/images/files/78984792628.pdfIn PDF document text
    • http://mextro.de/upload/files/dalaluwebepadoniv.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/10806321201.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/43692782348.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/be9f048838c744526e3dc6dc4de42c59/86122956223.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/mononusarokuvagu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4230a0578---62230414470.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 17700 bytes
SHA-256: 117ef326d7d295f8f0dd8aea987db7cb4f0b3c7a8158f260cd04df4586aa7843
font_01_sfnt_off0001302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302E 10584 bytes
SHA-256: 1af448001cfe56fec003fd1d6462618ec9f717d10d8f80637fe375fffd4bd1ed
font_02_sfnt_off00014866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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