Malicious PDF — malware analysis report

Static analysis result for SHA-256 003d09a002ddc7b5…

MALICIOUS

PDF

83.9 KB Created: 2021-09-18 17:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 71c76e3d87f92ed0366e5629064c01d8 SHA-1: 3dc04fade41319cfda37f1e17023bd538b468720 SHA-256: 003d09a002ddc7b5022be5af8023df17a1643fcbd806aec6f5a17f5ce12ef8f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs, several of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://www.santamyoga.be/images/file/50497632373.pdf In PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/9d9q0jnhm0ih5jdq4d7mb5q3tj/70057435094.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/48122746220.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109042049556702.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/45601462742.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/69808095957.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/serujod.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/gukagefidadotepum.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/91731801979.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/96b76d5ad8ccff3701745ed9dbb4ffbe/fupufo.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20219518340555.pdfIn PDF document text
    • http://e5tbr.alruaa.com/ckeditor-ckfinder-integration/uploads/files/pinarimedid.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/89376988417.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/58791202043.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142419cc5532---kapaxowasi.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/tojuzigakuf.pdfIn PDF document text
    • http://seritour.com/rsm/files/nakaganivonuxozosaz.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/jesewudozeba.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/xufedezadutidojoxiw.pdfIn PDF document text
    • http://yuli-china.ru/d/files/16311450032.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/20606363271.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021916157341555.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/13223820471.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613426d3844d4---82952199718.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/35888532201.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/dokovew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+transfer+files+from+phone+to+laptop+with+usbPDF 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://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_off0000ded8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED8 10940 bytes
SHA-256: 8ad694f29a1e63c0b1020eebfea271939e40f1243bd6afdc1e4a9accca10ac76
font_01_sfnt_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 19036 bytes
SHA-256: a1b77120a5ae45017222c02a5a62f8e27fe1a48a555c97ad9e01c08dfeffbd8f
font_02_sfnt_off00012968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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