Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd80c948cea0bcec…

MALICIOUS

PDF

76.4 KB Created: 2021-08-05 19:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aa27a4dc909b2ebec4556dc4cb607128 SHA-1: 7e7eb5f621f5f095e55319df0d4bc5ce53927911 SHA-256: dd80c948cea0bcecddcfe7a271c0ff2e2cb05b37e3b050415e4f26588d5da09b
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of numerous links, including one pointing to a raw IP address, suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://coretry.ru/uplcv?utm_term=algebra+1+module+3+lesson+7+answer+key PDF link annotation
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/m1la00q2apv00rcqkq17s8unuj/36806961797.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/jafubomogowulutisefepim.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55b05c92f---tavawarimasesibujasifopi.pdfIn PDF document text
    • http://focostrade.com/files/20210625204411.pdfIn PDF document text
    • http://argumentua.com/i/file/7352932377.pdfIn PDF document text
    • https://curryleafharleysvillepa.com/hang/userfiles/files/soroxidalemisipuwelibex.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/35aa6c1f9ad2f5647ef030bbaea26694/wipivikomixu.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/47445045502.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b59e9f311d1---jexiworadunogezo.pdfPDF link annotation
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073447c830d3---mitoselesevetano.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/pbu52oa1iu3caai1v4mshfirgd/rixuvoveresemudaxut.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/74991018660.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/kowerivalo.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/bafatosobu.pdfIn PDF document text
    • http://jaika.in/images/documents/files/viwogojoxogopomib.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1c1db4b56---95172934353.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/26964010696.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/seropujuramezedijedu.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/31917780957.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160bda14ce9811---60831144348.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/84193519054.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/sotomogomisogug.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/48675140133.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/medorulenaxi.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16241034659144.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/limowozonewibilo.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/2da882291bc7b370ea4c697606fe95d0/32571129979.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC727 15544 bytes
SHA-256: d10bc345d585fceacc82a1abd138eaa53eae5e40c60379d2d1248a7fda1d165e
font_01_sfnt_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 11188 bytes
SHA-256: a8fd7fe0bc3e041d31c8e23e3b2e3ca9ad6a0261739ff867b502b51e49dd994f

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