Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cde088b27aea084…

MALICIOUS

PDF

89.5 KB Created: 2021-06-30 10:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bc95cc45fdf16a118f58a541e2dd712 SHA-1: 449004b6adb7aa28f65d67736c2b7c20e43dd731 SHA-256: 5cde088b27aea0845c772dbafcadbe719382eb3efe65624973b0d9e3e48a2adc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary intent appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/47325dece6255f7d0efba51cf8d33177/3888231674.pdf
    • https://tsegypt.com/file/63423850024.pdf
    • http://acecaalcoy.com/userfiles/file/xutafevo.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9ce35a6fe---feveladavunomegex.pdf
    • http://lucann.com/Upload/file/67965980281.pdf
    • http://matthewsmillsreunion.com/clients/c/c7/c7863f7b93cb17915b2a89d887155530/File/lumeligejanikadojanabil.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606f483337069---rifofot.pdf
    • http://atenngo.com/admin/sites/site/documents/tokaluti.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32bae6ead4---18627076026.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2582a2bbf9---23353460735.pdf
    • http://myconnect-thailand.com/image/upload/File/61675715845.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9126119595---84264156670.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc18554765---68753291270.pdf
    • https://rumputhijau.com/contents//files/birononilafujep.pdf
    • https://gionggiacam.com/ckfinder/userfiles/files/28786313971.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/2d5f3d52e0394578ad434e62f3a1a1a5/bomene.pdf
    • https://diaochue.vn/userfiles/file/fubesik.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb46f8061dc---robugixarala.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/9795e7d1ea0c9564a540ab352e46939c/68918456994.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/aqojm7n6jqbhpdqug9qbimmbb7/94306907677.pdf
    • https://pendekaremas.com/contents//files/binatipo.pdf
    • http://cablexconsulting.com/Upload/file/8410144666.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=new+cast+iron+skillet+care
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 16792 bytes
font_01_sfnt_off000113cd.bin
bf8366c99803e5591206f195dc1e7f1b74a91c990b00cfc68a7944435a02ac36
pdf-font-stream PDF embedded font (sfnt) at offset 0x113CD 17464 bytes
font_02_sfnt_off00014135.bin
77e64ce730f5035e46cbc7e823816bf3c7cac5d0354b514c15f5fb9577562f76
pdf-font-stream PDF embedded font (sfnt) at offset 0x14135 10376 bytes