Malicious PDF — malware analysis report

Static analysis result for SHA-256 866ea09b2213931f…

MALICIOUS

PDF

72.6 KB Created: 2021-09-16 02:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c51867222983ecb81f839c693bf6c44e SHA-1: 06fb719544d8d9bd9fdab4ebdd98221b71556133 SHA-256: 866ea09b2213931f8f92a7c88ef2d45e8b3ed44644a1be414254d03b9d1a9647
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The presence of embedded JavaScript points to potential execution of malicious code, likely to redirect the user to one of the listed URLs for further compromise.

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://irlanc.ru/uplcv?utm_term=the+intruder+movie+2019+123movies PDF link annotation
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/tunipovebel.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/xeruwifole.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/vafixivulatexowogeleb.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/bowutel.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/20447036920.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/10726027349.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e607a7dee4---61012620325.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/66463871595.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/86152219970.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/78266325541.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/48867286649.pdfIn PDF document text
    • http://temple.mo/userfiles/file/rifevuvojivabugedulajid.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/434563105.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210913080408_5c6n5r.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210904093040675.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/fatuvuraxabijokuzuje.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/foguruz.pdfIn PDF document text
    • https://best-label.com/upload/files/xufepanetefesinabopaw.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16133b6e4c4c60---jebajiwalanojaxefade.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/66845731419.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/28079545084.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/bodajita.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/kudirevevo.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_off0000b460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB460 11068 bytes
SHA-256: bb3fa6c0352be4b2b8a4b74e04b80b9730ed246b3ec2d31ac76e96498f63e30a
font_01_sfnt_off0000ce1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1A 18044 bytes
SHA-256: db9fda48cc28c2b082e610e9024feacf773f3f625636b486659f74398194e09d
font_02_sfnt_off0000fcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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