Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e9d588997cb826…

MALICIOUS

PDF

97.7 KB Created: 2021-09-05 22:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 58cfb2f5192563d8cbe1ebaf42fe93a9 SHA-1: ff28ad550ff0b223450ff056ce050f1e68d8ad6e SHA-256: a7e9d588997cb826a34c5996c68d383cb469243d6c19ee809fb0bfbf5ac232b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://nomylo.ru/uplcv?utm_term=farm+animals+and+their+young+worksheet PDF link annotation
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/nudelakomevexivotugur.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b75252002237c40e3974cc2f266071ca/99800966729.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/71611860650.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161275d74392ac---riwiw.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/61262236934.pdfIn PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/80780190492.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/xenitemanogupefijoleg.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160892e3f8032a---tivebexuxaw.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfca96983ba---gebuxepajewewu.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611a59444fc91---80222031515.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b78135020---55314308572.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/pelikobidemazipoparof.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bewakaxonixuzoxapitiwevag.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/xurob.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/34604156851.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c544f460e5---tanajoz.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/ponukonopobixunejodifova.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/49126571011.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e051750da---34115000458.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bed407cef99---81537178687.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161261a5f0b751---vegirobobirokowokewewovon.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a1548bcd1---togovirugojovu.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/jamozepoxuwu.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939f19805b8---gomexuremam.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_off00011969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11969 17760 bytes
SHA-256: 2af5065066a6a53175415dace842613939a279dd3887cda095c8cc3a35a6906b
font_01_sfnt_off00014760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F77 11064 bytes
SHA-256: 91ccf841a9bdc6cfaf3455999c3a3aa806f440efca2a4497cf3d8120ea7dab39

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