Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c29969d31850062…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 12:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8dc2d9569f718bddbb3e1dfd0a71c425 SHA-1: 6a380b57e581fa096311447fcbc1ab80a89dbf9b SHA-256: 1c29969d31850062c6b2c0cda54bd138db009d7dc2532316e369c0b4418d0250
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including links to compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=dude+theft+wars+unlimited+money+cheat PDF link annotation
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614189c69db01---74993260631.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/bubunefimojorusurukaxuwug.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/12701383863.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/redaveluvejutobikivuza.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210913200456.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/34837934283.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/161466c9d0fa9a---68742736535.pdfIn PDF document text
    • http://asfalon.com/__files/file/17679131863.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/8545136499.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141770048515---pozelitolakop.pdfIn PDF document text
    • http://www.bandungmesin.com/file/46144808432.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/74137042832.pdfIn PDF document text
    • https://avflash.nl/upload/files/fidivosezejafunoxowaraxox.pdfIn PDF document text
    • http://parfumland.sk/upl/jafosuborevenar.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/jikeworedurapugisona.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/47596060653.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/xegoxivap.pdfIn PDF document text
    • http://elfobchod.cz/foto/Image/file/sixapolakexapedoko.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/jexagovarekezi.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/66589519873.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210912055627.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/kimevosusexunux.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/67556486290.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/95944105869.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_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 19408 bytes
SHA-256: c78080d33c3483a14ca6a9bb6f04fcd03e1daa2c55a5a353c3afdbdd71bcbd03
font_01_sfnt_off00010a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0E 11044 bytes
SHA-256: 3f148782a5d8123409873508d8ce7ac096bf0434793e7545c44bbf178ec0e323
font_02_sfnt_off000123ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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