Malicious PDF — malware analysis report

Static analysis result for SHA-256 674c5baf325ce1fc…

MALICIOUS

PDF

100.5 KB Created: 2021-06-29 19:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 40b9237f7e39f0f34a33af323eff18aa SHA-1: 17877dca3e83e0a52415c7ebf28696fa089d658a SHA-256: 674c5baf325ce1fcf3652a6bf02e16e0d63d21df05ea2a6da02be6e8d1c8bb56
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely used for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/8eb0e71d955fe189ceaf167707a2d582/40588290208.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/19a6ea13b63ff2572b7e5f5e47418a63/sezabiruzadirefomar.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609eba9452404---2880851759.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/035855a70e26b1a7adf733fb741afcfb/bujikub.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40bcbe838---10621284313.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5fca69b47---49979103023.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/vetowujokojixebiruw.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/kisivumivimevupewekezipi.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2af0a9e75---pozebifosukitimi.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3bd6a1f89---wurifejewa.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/65434031814.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/buferalafadutexifuzanos.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/9bb44f98a06effe8ee4b59f62236061d/xetigatekagufupixadif.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/63975008213.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608238d2cb56c---68724055417.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f16844d8c---48562082908.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/17928268985.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/affb30b1d015a99edbe214fb12dc984e/21591685506.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/c30kj79h45rk6rk9lvkmjfv92s/wexadamop.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/kuzoxopagiw.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a82498c482e---joviwivoxeve.pdfIn PDF document text
    • https://dacsanmyhuongbeti.com/app/webroot/files/images/pages/files/11362744705.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32e04511c7---30867396552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=embracing+sun+and+moonPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2D 10660 bytes
SHA-256: cb0a9ad91c57446b96b80dec0040b3eafd75be4567e81ec1262d208d6c744449
font_01_sfnt_off00012747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12747 16760 bytes
SHA-256: 2ec7918a8d5a4d3ed284210e6b88b19eb2595379162dd5a1f17e09f440187ca5
font_02_sfnt_off00013eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000156be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156BE 17424 bytes
SHA-256: 39c13a69660f14ee0d0dfc0c24511f6a0c8408c6d8e71cd773db5f983ae2b8d9

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