Malicious PDF — malware analysis report

Static analysis result for SHA-256 352388b0ca1e9fc5…

MALICIOUS

PDF

97.5 KB Created: 2021-07-01 01:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f8f7ea83d690d38d1fcf0af133fe7ed8 SHA-1: 4bf105811870a3202dd58ef916c997e89ccf5124 SHA-256: 352388b0ca1e9fc513afa2328af164fb7911d2928c934c809911a05b95ef9d1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/mps8nltmdvli0a4l8f0c0kvrj1/95604165633.pdf In PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/51ed311aab8ef0637e2ad9313f1286a1/52600798030.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/wedoxodajonavixawi.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/10d78219dc3cdbcc560e5f433f251b05/nibukumoxinijoj.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/najuseno.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/2123436acik97qo4o97u353krs/37504970548.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/segelatotebofijeti.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/xemavulasadolupipikorap.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/roxoge.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/37449675436.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/vataguwalogap.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/kegez.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be9d2296a13---jibib.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/6026713818.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/zomudonarize.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/bezesizasutukote.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c38c415dc33---58133051779.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/jgmp0katmt5r6iirn1l40om09g/10552214832.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/zopol.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49488a7191---53108264122.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/d566ff8574300bcc007e0af77fb522c9/3682202086.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/79hsk6aptt68m3ufmfnte6esbt/37537869002.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/4fa5cb8e0420bca2ef2a9fe1a66da713/vobazaruguzufa.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160748043a0101---20659864532.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b26a7a24a---filuralawuzijemamulipewe.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/8gqkesc9sm9tn5v4vc5i4brura/68880743178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sales+director+interview+questions+and+answersPDF 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_off000118da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000130f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F1 10836 bytes
SHA-256: 650ff1dce5560d0d66d0c8749d50c1832f86f9e151955a5934b254e971941cfc
font_02_sfnt_off000149de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149DE 17792 bytes
SHA-256: 4599626f77248687cfb3418cb8a429b150b22cdfa47dbbc666ad44dc2ebf8078

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