Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3c939b380c782f…

MALICIOUS

PDF

79.5 KB Created: 2021-07-29 22:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b0ce3b1696cf8168f213ade031ae2290 SHA-1: b6f44078fdcdc3bb3f9aaa400dd5f04a65a7e5f1 SHA-256: 1e3c939b380c782f7b239548354333cd3c8b09b3cc265f72716fa1ce427a32a7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting a link farm designed for SEO poisoning to distribute malware. The presence of external URIs and a raw IP address further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://universal4shipping.net/userfiles/file/kumoxorepezo.pdf In PDF document text
    • http://banghetretruc.com/media/ftp/file/22842048112.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606d09de1f621---gesaveruposusazotiwabadin.pdfPDF link annotation
    • http://asustainable.com/global/file/91169394935.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/zomapima.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39ba34d30---wobefirezikezisamazavap.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/70985168867.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/70390803354.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/tuwoxurisavuwumikorosimu.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac90fd9859---43017182327.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d06c390513---86854280812.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7938644da---wijimodaluwezodalodekax.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f99b9a33d2---5629507107.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///xapefow.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/93319809272.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d6c25dede---leturefidofiduliruj.pdfIn PDF document text
    • http://mayamalay.com/clients/874202/File/rubomapisimodoxu.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/69306768580.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1t0v6grjvjlrqp0pna4484tuu0/92661561137.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/60869023132.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/f26022c9f7d34eb31adca5d9e62fe629/fodudepijeledefala.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083610ab0176---jewulodilarinoj.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/75594265952.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/14343078726.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce645ba0bb---78170530304.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/baminaluvonivuxixal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=dragon+city+hack+no+human+verification+2020PDF link annotation
    • 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_off0000d0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A0 11184 bytes
SHA-256: 10508cb3832d84661610b85abb01d76395466408ca3e64325ba28ef3fe150944
font_01_sfnt_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 17564 bytes
SHA-256: 09426453fa83fb5cc397cf0d12b5af7a21415e80ca1c4728d424b4804cbe6307
font_02_sfnt_off00011851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11851 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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