Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e76203469d2815…

MALICIOUS

PDF

81.8 KB Created: 2021-09-01 21:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b8128db4493def29b857e939b230b1e4 SHA-1: 327384bfc34809d87ffbc0dd388bbfb8f0300c32 SHA-256: 54e76203469d281530ebd554ad1b93756038279194480b02449dc51f6e7deba6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://catamma.ru/uplcv?utm_term=the+turkish+passion+book PDF link annotation
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/2bf1f28e6cebf9ff7a739f8b071120dc/75261743598.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49bb4c1c7---nixisin.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc66b718aa---vurelavibotudugobejin.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/xozuvakokunu.pdfIn PDF document text
    • http://chpcentre.com/files/file/vokijeseduzitezexixir.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16110fb8b50272---75924097165.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/e20e581a58834426344df1705ee59a7a/54161214572.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090888e36e0a---97411052055.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/48105604021.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/53000932483.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/leponopimogama.pdfIn PDF document text
    • http://asfalon.com/__files/file/kolobevirazaxo.pdfIn PDF document text
    • https://warungmimpishio2.com/contents//files/90131055227.pdfIn PDF document text
    • http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/midirebubalojoroge.pdfIn PDF document text
    • https://anjingliar.com/contents//files/28434051582.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1610cc5128282c---69287665853.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/suditolagivimopam.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/dekitaperolafogozemi.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/71266238588.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e636d9b26b5---rixevov.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/50346356790.pdfIn PDF document text
    • http://cpils.com/userfiles/file/metudowob.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_off0000d838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD838 18500 bytes
SHA-256: 8835d21757d867851314021e429ba4637425145b91dddbafec8ceb135455df1b
font_01_sfnt_off000107ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12003 10600 bytes
SHA-256: 0d92e7e2fd47db86b62c14efb0a1ea8b42ef22a8eb63dc25062d52a5f9e2f231

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