Malicious PDF — malware analysis report

Static analysis result for SHA-256 0810afd1953b7a1e…

MALICIOUS

PDF

92.5 KB Created: 2021-06-17 08:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 940e46569f536ab132eb949ea20842f6 SHA-1: c94f096ce785c19f2acda505e75ac5e5b82aa30c SHA-256: 0810afd1953b7a1e7ebeb9fb4d5d610243d1e73b13425d954aa3892428cc5fd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites, likely serving as a lure for users searching for media downloads. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://inwebjor.ru/uplcv?utm_term=punnapu+vennela+valalo+mp3+song+download PDF link annotation
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/029bd46defc901fb68cba8683fe38999/74005086216.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/fb4c19c21066ea30ce712baa4a670b5d/71226208640.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/40d2d73b9614e9c93ea29c3cbe61a36c/90546814028.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/c3gm990s215hrcqrssp4agqovs/76223506955.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd11264a14---92623768285.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d3af264e7---dupupuvipaluvenamedamakub.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/44083d2afa30bcbfc6819126d40f290a/detofakizegifozedu.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c7aecdda8---82032154902.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779fb29625d---mixebu.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983c0ae974d---6285694941.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/ce9252ed4fcea9f5b1ccf022f7ddc5cf/84747114961.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099440d878d3---85404863934.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759728092f1---jaxusimanoboravokosuxuka.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/gefinonemuzanim.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/2dbk8fma6uv49jcekpl0911d3h/60280607210.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b9b34a1cf7a1062a0c60e578cf5b9f0e/letilomaguberorulemazos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87E 5500 bytes
SHA-256: cea3fa44b21c6142ad81c4b65a12badb827302798bc46c4369f2ddf844b78f4f
font_01_sfnt_off0000fb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB35 33400 bytes
SHA-256: 1192c48916fc655fd2ef64c79ca35094bc9cf9342e28d9bf2448f06f7339c5b2
font_02_sfnt_off00013ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE4 11012 bytes
SHA-256: 9b0a10cafca630652e6ba00a116f43b3de1441d34d1fea5f53892c112364012b

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