Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eeb1c700ce5b904…

MALICIOUS

PDF

73.6 KB Created: 2021-09-16 12:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a98b3d05f20962a313db4c66053d4698 SHA-1: 718c68021f2a2077aa943bde40d37d4732275ae0 SHA-256: 1eeb1c700ce5b90457aeda08f948a712e50eb9eea595279c4914003e178d8fe8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JS points to exploitation of PDF vulnerabilities to execute code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=nokia+android+phone+bangladesh+price PDF link annotation
    • http://abwjefferson.com/uploads/files/bijatijarer.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f65973d7a5---49043608191.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/96218403507.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/39963716901.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/malotuz.pdfIn PDF document text
    • https://polandpools.com/contents/files/getirafalobe.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/muxirexobivalog.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/53138882312.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/90570632880.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/xinezanawujom.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf95b4dffe---84266133853.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/bukigisu.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/87154910984.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/zukabazazomiwokonunajifut.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/gunutexuwerupatoradi.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/xesomenotaramufosa.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/balakemikudaxuvomu.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/xejodiwupisivej.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/nesimobinavu.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/19575417354.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/lotosomutatukenomuguxekuk.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/lipiwosemugax.pdfIn PDF document text
    • https://loyallcanada.com/editor_files/file/pazodakerodazukomedozed.pdfIn PDF document text
    • 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_off0000bcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBF 16856 bytes
SHA-256: d35f3400ae244549593201ad2a31011446ddd9c49b4bbb828c040f96f995a4df
font_01_sfnt_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 10904 bytes
SHA-256: 9595840c537077841c64f2c46794d35555c7a1ed55fa3ff25158ac1f727fda5d
font_02_sfnt_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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