Malicious PDF — malware analysis report

Static analysis result for SHA-256 379e96d6469c8464…

MALICIOUS

PDF

87.4 KB Created: 2021-06-30 21:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 717378b2c9a341ffbaccb5eb0e0557f6 SHA-1: 8b3a27b3f5241a4b6b7e8afca402f9d903bb9448 SHA-256: 379e96d6469c84649c6528883e8ea92ec1f7abaccf6bca767f21084ba320f688
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains multiple external URIs and links to compromised WordPress upload storage, suggesting it is part of a link farm designed to redirect users to malicious sites. The PDF structure itself does not contain readable content, but the presence of numerous URLs points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=tingling+in+jaw+line PDF link annotation
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8671280e55296e785bd22d43533a6786/30549066097.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da1ce660473---53091452759.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/bosuwitiwuwalapevotab.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/lugeburarugudil.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/rasubegunaxemulegomupe.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/bunob.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/a9v22qsg7hekff29t9qbaf2020/47826739693.pdfIn PDF document text
    • https://bem-sa.com/img/file/fozuwesozolok.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/lds9t3sho0rrdds57g3siitjb1/boguramudikavamavogesig.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/2e80d9dc4dd57e3a473b68bbb7f95e1b/joripolor.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/zojip.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/37205716148.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/oh7tljcni4gefl1pbpft6abpm6/vejaxu.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/30527874077.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/21933751029.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/ffed9182506eccc32b3b3924104ac4e6/77505209052.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd66600d523---mikuraruwojozuje.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8524d5465d---81069368817.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/shv3sn1te2mp4nqgms4m9t12kq/junepepevunefilezedetave.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/sutewa.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8de4099b0c410e87d423459851c7e182/79685043801.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c52f3493eba---pelazadepanemasodizujo.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/4jem25kacvhvv1j3970kghfvim/42640964182.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/51256782524.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_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 9976 bytes
SHA-256: 612a9b422e0b366a654035b0031787351ff4b32d32890aa7473a272ce0698ee8
font_02_sfnt_off00012384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12384 17320 bytes
SHA-256: 47b3805632713998f06e8175ae49506245b272b75e4fe05b54ad60f2e02a9e21