Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b8ef6d77487649…

MALICIOUS

PDF

86.3 KB Created: 2021-09-22 15:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6bb70a0149f11283d05ae31a22a94b2e SHA-1: 214d1d757e86e2ae48b597f1d1f63b501783367d SHA-256: c4b8ef6d77487649ab397fe7357ebaf2f639a7a7b24a145433de07b2725eff8f
146 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The presence of a link farm on disposable hosting, along with a direct link to an IP address, suggests a phishing or scam attempt designed to trick users into downloading further malicious content. The document body is unreadable, but the heuristics strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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
  • 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.
  • 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://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/660e5e7d2133281f2aa525b3187cd59d/lebadekadokenulawosadut.pdf In PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7e8b07134---38472733630.pdfIn PDF document text
    • https://alev.az/userfiles/file/82275271429.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kexalaterigosirofazad.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/91717894307.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/ralenojivuf.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/vubavoluvovitoboxajubezi.pdfIn PDF document text
    • http://charivne.info/images/file/foduwapumerifeposoxofuveg.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/xotatanokerapunamigi.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/93905436751.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/15963199772.pdfIn PDF document text
    • https://businesslife.com/content/files/74710775023.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/jetosaxolabolidibenuv.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/vowivomeju.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/zinaniwavilefefodifaj.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/24275586073.pdfPDF link annotation
    • http://www.szphotar.com/admin/img/files/rululivosemuxolajumajax.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/34373378236.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/45813795479.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109191952525284.pdfIn PDF document text
    • http://mlead.net/images/e/file/98974157354.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/zowojolebetobomudu.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109100853573123.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/zemomoguzutojuwomo.pdfIn PDF document text
    • http://skia22.ru/pic/file/fenakevudezotifot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=fake+location+gps+apkPDF 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
font_00_sfnt_off0000c5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D4 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000cdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCB 16248 bytes
SHA-256: 9c5f0dee7071e92bba1ecda23414759625b2d18333a704786a337f28f6e4b96f
font_02_sfnt_off0000e3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 21080 bytes
SHA-256: 8ce2c391cdf349dbef4646108f5aef16cadd394ac37d80d6216f08c19544040e
font_04_sfnt_off0001326d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326D 10516 bytes
SHA-256: e3a60c067f06735f917f84eaab85067a324e3daf893e1a49fa79983ac10e8588

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