Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d82799ea17c2a3…

MALICIOUS

PDF

87.9 KB Created: 2021-09-20 04:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b7c0081120a414067f865a8013382645 SHA-1: fa980bd6b01fad6a953c7873783ae70ae57816e7 SHA-256: e2d82799ea17c2a334e4ac9ab42e2652715f6c9ef031eb36b1b2d0d76be16f5f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with many pointing to unknown domains, suggesting a link farm or phishing lure. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high ML score strongly indicate malicious intent. ClamAV also detected this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://glttek.com/userfiles/file/34926820309.pdf In PDF document text
    • http://szyqjsj.com/UploadFile/file/20210914095036392.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/3298820686.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/veditobavojogujapapiku.pdfIn PDF document text
    • https://pactforfamilies.org/ckfinder/userfiles/files/winiki.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/48951688612.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/18284121764.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/wifivuwirekevobogodafela.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210904_9B3BDA9C21BF574F.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/ridirupafedogubab.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/fikebixuvax.pdfIn PDF document text
    • http://school15-tyumen.ru/f/rirujatepagenoxefan.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c02b3a71dc---loturadusedeli.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/nudolesegabarisonemifo.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/49320850818.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/lodamoledeses.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/gewaludenamokewegesaf.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/takafefasawisodenigi.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/16921268761.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-13/20210913172705896985.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/61353587e6bef.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/90582174572.pdfIn PDF document text
    • http://belean.pl/userfiles/file/31663984182.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/94583049803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=tablet+android+no+enciendePDF 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_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 10300 bytes
SHA-256: 0a011ad111de585dc97c01b24aecc67f0c48eebf2727e640feb7690c29b4db2d
font_02_sfnt_off00012209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12209 18476 bytes
SHA-256: 122d0ddb90956fe50d80e38046f57abde0839137293f826cfe3c1f16add1523b

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