Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e5c0e5d479b747…

MALICIOUS

PDF

83.9 KB Created: 2021-09-18 22:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d62d116fee27f283058bc19c953414d6 SHA-1: 2b96769b9fc867749686c2efd406d0c116e40984 SHA-256: 80e5c0e5d479b74741d824cbf319c4806710be6ebf364b9ae224b4c0b0c7458e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to suspicious domains. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://sieuthimayphat.com/ckfinder/userfiles/files/75931617867.pdf In PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/favijikavewatiguzotis.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/bigogolujebudur.pdfIn PDF document text
    • http://freewest.at/tadiwesoriwamokagoboj.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109151949353592.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/kufeguxaxebusiv.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/ragalarisokiliji.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/xatokaberixudikop.pdfIn PDF document text
    • http://dkind.net/userData/board/file/wafogenumukigujuxuz.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/59394260225.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/96538219342.pdfIn PDF document text
    • http://kasand.com/userfiles/sowiboxanogojozijipigiv.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/12988221818.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/rasanotijeduwekuxoto.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16135356c98517---xujijugat.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/49196697845.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/dajonuzasuv.pdfIn PDF document text
    • http://btfa.tw/upload/files/fabujijewegobazerini.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/3160658844.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/dufatiwoxowadetulimiv.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/wesaxunoturaziluwunedujo.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/tizojokasumawexa.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/43276557597.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/kikexuxafaton.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=processor+of+redmi+9+pro+maxPDF 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_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33E 20672 bytes
SHA-256: d06640319e5202c5f5553900f18296cc6d3008b704483e10887fc575f9205cb2
font_02_sfnt_off000128e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E2 10804 bytes
SHA-256: db9df5a821ba964bfe775b357e6ea67f3b3fe64acc17309bc595974cfd0d78c2

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