Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b03c2066aa7b93d…

MALICIOUS

PDF

81.2 KB Created: 2021-07-13 15:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f325a6d94fa811b9b74ab4be0b784a26 SHA-1: 790eef0a379a1042757ad0c89d8219bfbd28b772 SHA-256: 5b03c2066aa7b93d1dadecd92243b5aca3a351df9706df0843a256057bd4e9d5
156 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 functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads or disposable hosting. The presence of numerous URLs, including 'https://cructi.ru/uplcv?utm_term=how+to+get+villagers+to+trade', suggests an attempt to lure victims to potentially harmful sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://cructi.ru/uplcv?utm_term=how+to+get+villagers+to+trade PDF link annotation
    • http://inciboya.com/resimler/site/files/97385542872.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vesub.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85adb92254---wegaxadiju.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/dacjlvs42k8pkebh2kle3qdi45/54378261177.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/1c5as18sshn3ir8145sn671jjs/88893568048.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3e3b5dc60---11903066553.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/46868089871.pdfIn PDF document text
    • http://unityproductions.com/upload/files/wakoxaxetune.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/17864658487.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/46809585156.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/3c5aa876f6d4c8da54f4d8fc3d5e0245/3371266811.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/nadafasajew.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a614a2279b2---80549630734.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/11507340824.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf2e37da7---15162106882.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/jujaxo.pdfIn PDF document text
    • http://caramelitos.sk/files/22658386448.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/51829258964.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2e9ea6bfe---79540344278.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/3830bc1da8c289ca9dbab389f66a18dd/rulofotaketenix.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083d265aed98---muxogujux.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e8636d6b6---3329357002.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/021rvsgtlfc5hj6m7lak9nnp03/domixarufuvegarajibalid.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/67413123911.pdfIn PDF document text
    • http://17njl.com/userfiles/files/siniru.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_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 17240 bytes
SHA-256: 178f8b3324478cb4b3248b09294bdc3f3c5a025e20fcb6f80c67cfe6f2e5861c
font_01_sfnt_off0001060c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E23 10460 bytes
SHA-256: e9c2710477ef3485a1bc49d60d6607bb87f92fe5eea7cd89e81058b675c4e41e

Open this report in the interactive analyzer, or submit your own file for analysis.