Malicious PDF — malware analysis report

Static analysis result for SHA-256 00491d488665310c…

MALICIOUS

PDF

74.9 KB Created: 2021-09-19 22:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 591f2af0b586fc2d0e95922dc17f1113 SHA-1: 980ec26f49689cb6bc86ecb05c979e071707e3b2 SHA-256: 00491d488665310ccc1c848983e168dfcfbff2786b430d6cba90394556232bc0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7350

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://philabc.ru/uplcv?utm_term=download+fifa+21+mobile+apk PDF link annotation
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16142796874e53---81500638799.pdfIn PDF document text
    • http://rapet.hu/files/19156517949.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/23815495449.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/45565383980.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/nuvixovutodixaganukaxof.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/rekanimajabamitidezuk.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/rokiju.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/21913891599.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/sazemosavokibemime.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/10426868460.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/tulifika.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/nunidawanuzulatetubakela.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210905143028098.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/29914454880.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161315921cd5e4---150165361.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/genowokujivorigunala.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/89614666102.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/20766045314.pdfIn PDF document text
    • https://podimercrm.com/img/files/rewejuxukete.pdfIn PDF document text
    • https://olterus.com/contents/files/velepexodigezipalu.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d394c31e5---80703234562.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/63465822679.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/sujararixesanok.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/71906617039.pdfIn 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_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 10784 bytes
SHA-256: 747604c0bd459bf194f7b9d532fd4f9f19bfb6d516567e8122168c8b67ff3b00
font_01_sfnt_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 17236 bytes
SHA-256: cdba7bd4c461d9bf28656305d23c97b1df141126d6531acca8eb2428b24506f6
font_02_sfnt_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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