Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e00a086b4a0cd07…

MALICIOUS

PDF

82.5 KB Created: 2021-07-21 05:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 26710d6ba87fd4392da4aa52bed88420 SHA-1: eae981546abe378550c713cf4eb20326c5841e8e SHA-256: 5e00a086b4a0cd07a0188cedee747287aeb4dda23d0c6a35adbb2ecc35db0433
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39b163caf---64911154132.pdf In PDF document text
    • https://saatyapi.com/upload/ckfinder/files/jikerepivakadepebetefun.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/69113519679.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/e28b9e9a8a9c71969bf55907bced1916/zekimifuk.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/23278252964.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a428de9bf---nepozarukomujojonato.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/boledemad.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9e2b4da83---tidabumaxojona.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80629b903d---44005996319.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608139036ade6---301641487.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/kenagepedufufu.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/36524401940.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/45892737054.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/kejaturewaduwusofuw.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/01cc358b14fa97cc5613f83ca9c190f8/49252150848.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/31256f34787780e26d00bbcaae8ae695/10501726456.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/bepofegujuxiromivizujoko.pdfIn PDF document text
    • http://apcmagon.com/userfiles/jufegulobowalobemiso.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086ad54b2160---xofixajizibagilolugefil.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45b9a6fdcf---63972431515.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/9dda0fe86a7f46947cf475e5d762fa23/kodomapidepumijifexalojuj.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e5d3dad65---bupafavumolofabavutupi.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d23dad6229---mumefokumizirabipirum.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/71209997493.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=physics+notes+class+11+chapter+3PDF 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_off0000ddfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFA 10812 bytes
SHA-256: 3b9e8382b2893bc559135496fde89ea5024bb73b453ba5f46fc4ca094cf75c6c
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 17736 bytes
SHA-256: 0be7cf5a4d83bb482b9405bbc38017d6c3ebaa0a2c9326b67e1490f7bab0a9d2
font_02_sfnt_off000124ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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