Malicious PDF — malware analysis report

Static analysis result for SHA-256 4708092393d3ba5d…

MALICIOUS

PDF

77.1 KB Created: 2021-09-07 21:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1405c30a9c08cb7baa9232ca29672f2d SHA-1: c725176b99f36f36b7bf692bea48a102fce7d476 SHA-256: 4708092393d3ba5d71a708daf815696991ce3955ab6e55753dc67baab53d1a5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://coinproject.com/userfiles/image/file/3709932331.pdf In PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/3f932a79cd35b752f6cfbcd2d480ab18/zadusimeroxa.pdfIn PDF document text
    • http://bjallstar.com/upload/file/febumifuduv.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/5m5vne25cr8hnmdt9hebbqlec6/19463385499.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/00dd745c6b2f785a11180caa3b8a710e/40916648095.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881a9b80d85---risamaduzuwofes.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/moxunegogazilafutefuriw.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/15156090425.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/toxurivutigikusoxujusisul1622164168.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d2eb0fb39---76386851411.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/jasimizizupubowusisotidu.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/parimoxexosigaxope.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1de397f0f---nazekupanimimemaj.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/mepemotugiwotorevoxeki.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/5laiad3pg03ls98phuigi9vtu0/napusoredokijekomudi.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/panapawebidoreretobajek.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/51923991145.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611275a79ba20---lujusoperideli.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/99041587577.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/a685ff137a8359cd090c43466a224ba5/60325888984.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/85069393265.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/4346674378.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086acffabc3e---kidurukixinusamigani.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f303d34b5ec---rifagofejenatit.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/defusinatobuvogajafajosud.pdfIn PDF document text
    • https://esperidiaogomes.com/userfiles/files/powitewotefa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=quittungsbeleg+vordruck+pdfPDF link annotation
    • 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_off0000c7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D6 11092 bytes
SHA-256: d791ddd54235fc49023e0a4f74176c160cade098cb73ad164954794ea8af8966
font_01_sfnt_off0000e180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE180 17844 bytes
SHA-256: f492994c4b99eebc65b0e594299a71d805ecc71bc8264a45f48f80f08d70af98
font_02_sfnt_off00010ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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