Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd26131e6be029e…

MALICIOUS

PDF

94.7 KB Created: 2021-09-04 14:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2bae0a95daab6490d10071809cc36652 SHA-1: 2128490c41668aaa292b1fb9c7b1d8548dce470f SHA-256: ecd26131e6be029e3c787c74dffae60cdfc992aa8ba74989c95b5ab5aba2706d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm. These links are likely used for SEO poisoning or to redirect users to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://wastran.ru/uplcv?utm_term=wolff%27s+anatomy+of+the+eye+and+orbit+pdf+download PDF link annotation
    • http://trans-serwis.com/userfiles/file/84115260220.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b61278d4f---xawepo.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/161137bb78361f---93074975599.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0fb504111---14646527469.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/d55eef99ec2369dd93750902953ed907/kazalezizerezi.pdfIn PDF document text
    • http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/gogudu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084bee454fc6---roxiwageviju.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/dudijimanil.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/p87avs11jl5aq2dho4hk80e7bstdnrcr/livezarorotejomiliga.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bdc3270e0---45600980877.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/82356494425.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/lepon8t4o43gs6lcp4778qetb7/18314504625.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/b8c320dbad7cd890de593d3de568b843/xopemuxukefalifijup.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210701_023224.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/bdb9ef73e9f6af2c9cfdd99605477f87/62458204712.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7alh4qpbmsj6favs1218sjbqmt/66798276961.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/rujezizikixo.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/xepivutofobidujepanuzat.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/ferekugemulojozegulujes.pdfIn PDF document text
    • http://expresskaliski.info/file/19652208580.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/jsivjgq6bksfgunjh903v4es46/62419651092.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/67109028291.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/a1ec9cf3d749e1edec60670fb649c977/23107192483.pdfIn PDF document text
    • https://brs.jo/userfiles/files/teduvotejis.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/12484108774.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611ed83023b7c---59846064033.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_off00010b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 18156 bytes
SHA-256: d8eacc1b198093196653dd9f6d9fa705cde520c4d0871caf60cbe4b2694d5b07
font_02_sfnt_off000152e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152E2 11128 bytes
SHA-256: 769b577874ca8c543192ef8a424b42840d2e04319addcec318498565fadc09bc

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