Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebbf1181950e46e…

MALICIOUS

PDF

74.5 KB Created: 2021-09-06 09:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bde5a6271246fdcaaa5e6f18bd225d9e SHA-1: 1063561da585849efd1050169b50aaeb51b53ef1 SHA-256: 0ebbf1181950e46ec80560dd8a005f00bc7492c9e05abf13126fb6d833c7ba8a
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple distinct hosts, many of which are associated with compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to direct users to phishing sites or download further malware. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/a08e7fc923299843c62b6ba804bd9c06/95846458082.pdf In PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/potuvudavumatub.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/ronupulumelobewovobowo.pdfIn PDF document text
    • http://trickorsuite.com/clients/5/5d/5d84d12f6f4dfd10bbe5497c884a5f3e/File/71236296660.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/18251515685.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/rejugizasanirew.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/23290666681.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/a630947c5abf65acb5c9517d9290dfe9/52705716391.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9cc7d585a---wolosezipujikavu.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/zelivolilededipuvumutige.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/te5ms88q75814npk9dlq2a48vt/venawadidoxexu.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/vofodunilekozinopuselalux.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/62275791953.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/sujhmt0emp0cpmjrbges0lpv83/suxebef.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/29856444110.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/pasimipikuvavuzam.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b49d02efc---78778910085.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/8j0ai5942rm71rho2ohplo80q6/77316280081.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/bevuxofibow.pdfIn PDF document text
    • https://adikketiga.com/contents/files/97262559759.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160751979ac841---88860230372.pdfIn PDF document text
    • https://summit-christian-academy.net/scauserfiles/files/vedukolo.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128a5fe5f290---gazemulufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=catalogo+festo+2017+pdfPDF 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_off0000bc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC98 10752 bytes
SHA-256: 9ee5775837182070a0fd39d262c0cdc8ae24bf580f48674e0bcd77525c18a3cd
font_01_sfnt_off0000d57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 18292 bytes
SHA-256: 8576b448a4d1553e3c7badfd8bbff5732493b3a035d155c34323ba9cd77fa396

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