Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce4e550e33e588d…

MALICIOUS

PDF

95.5 KB Created: 2021-07-08 11:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c1665f1845f3be66b7ade00013fe6ea2 SHA-1: 17a630b2f5bef59a9bbaee263b5ef53bf4e02108 SHA-256: 0ce4e550e33e588db73a3042032f1c308333e3758f5b148a9c39c4c31e91e868
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of URLs, many pointing to compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the execution of malicious code or redirects the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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
  • 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.
  • 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=p5r+small+flowers+with+soft+coloration PDF link annotation
    • http://meadescafe.com/userfiles/file/rabebavez.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086ab1e4e4f1---lodomabulinevumajune.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/37298173659.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087af0ba93fc---2721894243.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/japuz.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/2lvl1fu18fb0b3hntels2gkj5o/ruleduzutivamakokekomakag.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/0fb792e71118f87ed344eb77ea730035/kugajujewigosifaro.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160727b11bc5bf---kigeroz.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096134ad7b1a---56324576434.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/6492a2f3a8e40853c752e43befe295ef/36483664389.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/c6a87d79fe69c3e7325066f2dbf0d859/20336921271.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/lekevupedo.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/97f4168cbcf62b7612a6fe8f3cce6df3/dovuposabike.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160752761abf22---3369221410.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/sjo8tjhrb0a5n53u6o55t28v7i/dikapupawumatufo.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a5d0acb9e---tumodekejute.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/22376314927.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d72b1ce2f---88570314258.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210701164921-xikofeva.pdfIn PDF document text
    • http://cy2hand.com/userfiles/16109548875.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/zelogafajuxora.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/bn7nvguqvoq1hj59t0t4e2690j/88378490131.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 1728 bytes
SHA-256: 81f277ff9ca9cd818deb606bd01635905cfcc4a95b7bb16f78738b4b14071178
font_01_sfnt_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 16932 bytes
SHA-256: 9f5188ce861e2bb6c6cb6ebf736000838cee36e48b1b53fc9b0b257f7b1560d1
font_02_sfnt_off000111cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CC 17216 bytes
SHA-256: b193baca860c17dc8a8e2eccfad857d071156d8fc230898807af47b35fe94513
font_03_sfnt_off00013ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED4 10824 bytes
SHA-256: 4bd8d969baedbbb0d3627ae33168b0c072c8aae2dc67906da7be24ac349a0bb1
font_04_sfnt_off000157b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1