Malicious PDF — malware analysis report

Static analysis result for SHA-256 94db8bf1c1474210…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 05:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eeeddad331d19425e7bfed2675d43e59 SHA-1: 5aeb5a1f51286e351771ddaca514f913f2f427b5 SHA-256: 94db8bf1c1474210345703ae8efdf2701c658dae9745ced7fc1ff02a7e09648d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable domains and compromised CMS uploads, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.tramag.pl/upload/file/28479786087.pdf In PDF document text
    • http://yetisirkaucuk.com/firma/files/takigajabu.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/8e05d17317498cd7f924cfd81455ab79/74047149253.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ddb857351---77102116630.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/sizuzafulovojiziro.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/3303129506.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/gafudotozavew.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/guvifisevunorobofidibowa.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/laweb.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/5mse5vkeeq850aqpvo74f8v0i5/52741276652.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/43044380466.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/97756728321.pdfIn PDF document text
    • http://turatabor.hu/media/sarisawezuzujadaranutovi.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/837gsakq24opefckg9390uqu61/92977348013.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/96003529193.pdfIn PDF document text
    • http://azizolace.cz/images/file/dodafaradarigorix.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/tififudifefisukukativi.pdfIn PDF document text
    • http://cke.hk/userfiles/remoziremedikonamonasax.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/tosimo.pdfIn PDF document text
    • http://www.pilartangguh.com/file/kedotazoditumusigibomu.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/wiwamevusuvuleji.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/liwugilijibetisisatif.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/50128064866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=lg+optimus+vs+samsung+galaxy+s2PDF 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_off0000e07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF893 10824 bytes
SHA-256: ed7faff213fab17c24685ac0485c4d7ca02a2e661f89c9b1947f507b27fedf07
font_02_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 17568 bytes
SHA-256: 4adee02328d529571c0a9aaf9e318f3bbc9f01f9386db2cd46b3813f815d7981