Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb08623c127458fe…

MALICIOUS

PDF

84.2 KB Created: 2021-09-14 03:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 21364f02c6b6af3e4973d1b127c43791 SHA-1: 65ea9faef34d094207d503632388fa1eeb95b6dd SHA-256: eb08623c127458fef71b64fb2514c56d62fcfd37e2854bd5524c2e6d180079fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via a spearphishing attachment. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • 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://rockhousemethod.com/ckfinder/userfiles/files/podalaw.pdf In PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/13707624800.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/67575612743.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/zokawubigimek.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/dezemavako.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210908044419847.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/98839051848.pdfIn PDF document text
    • http://suurelepa.ee/data/file/kovaxigigemogono.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/77070415513.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/57936466450.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/43254490764.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/49654396745.pdfIn PDF document text
    • http://vector-food.pl/userfiles/file/52687284561.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161351a13eb85f---fikovetunuwagisekasasorin.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/92091898834.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210903023320.pdfIn PDF document text
    • https://plasy.com/uploads/file/dozel.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/kujozaxus.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/rokopelizobowujusurus.pdfIn PDF document text
    • https://bataretak.com/img/files/file/desizajapemabufezeje.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/43398821469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=mp3+convert+to+mp4+downloadPDF 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_off0000e3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF9 17980 bytes
SHA-256: 1864f8616c83a6b1c8fe28557e264838531b7f951709116b68fd6d6db47e2ea2
font_02_sfnt_off00012a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6A 10812 bytes
SHA-256: 7e5076e02b56ba59aa6569f0d893fa0d7c45eab7fe646f27618ef1de4639e7f5

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