Malicious PDF — malware analysis report

Static analysis result for SHA-256 024362ca70c292ed…

MALICIOUS

PDF

69.3 KB Created: 2021-09-17 00:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3c8a405ad6dcd532563ed70478430a69 SHA-1: 77786a3f1dfc3f8cb77383ef04764b5ac714cfe4 SHA-256: 024362ca70c292ed9f0142313c15785d001b49293cf24489259e8f07c3c882b6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to compromised sites. The embedded JavaScript is a common technique for executing malicious code within PDFs.

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://nomylo.ru/uplcv?utm_term=storage+cleaner+apk PDF link annotation
    • http://mylivediamondinventory.com/uploads/files/fomokinokenezuxu.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/zesadopub.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/vomeruzisamukizurel.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/30369091994.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/66336193913.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/14600331208.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/92636063208.pdfIn PDF document text
    • https://arendic.cl/files/96639249104.pdfIn PDF document text
    • http://ccshecea.org/upload/files/95723697170.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/nigabemaruvefibasadek.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/zadumawo.pdfIn PDF document text
    • https://brakos.it/file/salokix.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/503788450.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/14996673936.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/23733104108.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/sumonuvaga.pdfIn PDF document text
    • http://360global.ca/userfiles/file/jedukabuxuna.pdfIn PDF document text
    • http://ceramkgres.ru/userfiles/file/31778962787.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/tuwofufapilatewibopovu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614324cee4c03---94446903685.pdfIn PDF document text
    • http://cycling-software.com/files/file/gesokamamovapotusozujed.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/53164627385.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109100942185006.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC8 10456 bytes
SHA-256: f5188574feab46e585edf646199cc5f4e18ca44c444f930feef3ec024372a74a
font_01_sfnt_off0000c7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AD 15820 bytes
SHA-256: af97a4a4a99df452718d8181b08675720660742c1983baaca2288a78d0b524c3
font_02_sfnt_off0000eff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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