Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc7792af02531d6…

MALICIOUS

PDF

94.5 KB Created: 2021-07-28 11:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8b81304660aa875a1f7382eaca8a862f SHA-1: b37a64c0c5af557b17fc50c38f28a505040694db SHA-256: 3cc7792af02531d647cb108387568c1e907cff257e22ffa6c0ad890e4faf7d17
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links likely serve to redirect users to malicious content or phishing pages, a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a754bf605c4---79984450835.pdf In PDF document text
    • http://come2menorca.com/images/file/79424425093.pdfIn PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/gageduzuzawasegufomu.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b074306680---88654189599.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/35188621999.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/zefopuvovexob.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/1849129647.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b8315a658---tuselelotokof.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/gasexij.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/28897036542.pdfIn PDF document text
    • https://nevisnews.com/userfiles/55424980752.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/91174981984.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/19291450726.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/tituvin.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/23788821255.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/69lq7pdg8s1k5erp3k9bg46nq2/16595306682.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/82298755316.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/mozinoterak.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/b6bb752217a3e1f25a652afb574ad09b/45095284200.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/28216870461.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/i3e1mdrfqf45edmidh9j163sf7/9099976189.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/juguwiva.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/mb51rik35beq0o2n3mkpn1jhvj/ferez.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/19626293241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=english+file+intermediate+plus+third+edition+pdf+descargar+gratisPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000c7a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC7A8 18428 bytes
SHA-256: d9536d663ccecbe62003f54334dc0df9825c0d1cdb270ef67e79c793df8615da
font_01_sfnt_off0000e5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C2 27716 bytes
SHA-256: 04d32569720c1330dc20ebbd144f754459648c93befdd5e5c9c8c0fa42b034a8
font_02_sfnt_off000129c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000141d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D7 11152 bytes
SHA-256: f807fe8fd2055e4f01ae795c7c4279d2dad41bcbb42b44787ac43969553d61e8
font_04_sfnt_off00015b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B69 4040 bytes
SHA-256: 5accd28b93f88256231765d54412dfb73b7c8b89e0db92651776be48329af4d6