Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ba0be79bffafa0…

MALICIOUS

PDF

75.7 KB Created: 2021-09-09 01:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: d113c2a4aa6e427335a6c10b9304e053 SHA-1: 2f70dd827a92f3104195a8dc06833c4792c5b808 SHA-256: 60ba0be79bffafa028e1e5e09fa3796bba758f3d7fb1d005d4291dea1293ccef
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://weifong.tw/fckimages/file/xekonevojakaxovo.pdf In PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/86457881702.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/27598133233.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/kafukulokejamawe.pdfIn PDF document text
    • http://rayer.cn/d/files/zebudazazigisiwugitorilul.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/28745366527.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/limokupupezupopexub.pdfIn PDF document text
    • https://phm.vn/upload/files/vetodorokiwewoz.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/wuxusuxexa.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/41616414039.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/96925694633.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/nomikepizedolovexebarir.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/27400491876.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/niruwifomekanexenakogenu.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/84721409438.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/jituroriranebuvu.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/lojisimiwixogamo.pdfIn PDF document text
    • https://2b3la571ga-70p.com/contents/files/xafakakeg.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/muwosapesufebone.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/81264738039.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/fenipebigokugetonaf.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/36592086957.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/32915105352.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/11268867242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=last+names+used+as+first+namesPDF 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_off0000c691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC691 16804 bytes
SHA-256: 66b12ff13da648354905a1976d5716792a5e3ad1f1512b3036bce8e0b4f45adc
font_01_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 10408 bytes
SHA-256: 2549258638ab61c1e7555b95715c0cdde688541f65c2cdea1377d7db27087f2e
font_02_sfnt_off00010975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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