Malicious PDF — malware analysis report

Static analysis result for SHA-256 1411b67d37f83e1d…

MALICIOUS

PDF

89.4 KB Created: 2021-09-10 14:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 523166148ea5d6d388be1b3ea2e59649 SHA-1: 587ed98266b8b87aa9bb27b28f0208fdc7a7823f SHA-256: 1411b67d37f83e1d3eef2914732a6c385c576b093fe63721e4eccf61ce1516f4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF with a high ML classifier score and ClamAV detection indicating malicious intent. It contains numerous links to external sites, many of which are hosted on compromised or disposable domains, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the overall structure point towards a phishing or scam campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lafenicealcamo.it/userfiles/files/5848666553.pdf In PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/kamiwegamunugurex.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/55972616868.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109070434094752.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/lumoxekakudokix.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/lirigoxogejoxivafu.pdfIn PDF document text
    • http://bolt-go77.com/fckeditor/userfiles/file/tizeralanutesanufale.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/rifajupor.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b39629cde8---87796195583.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/tumavojumokonegep.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/1351501080.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/ab20d5b72096d987f0c1c3e32767871d/91641914659.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/71447277803.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/gujametufasiwuziruw.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/bowamutaro.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-5/20210905070223234508.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/dorilijulapoligivofisotor.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109030509143924.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fa816923f---jatowixakajanezava.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/moxonumobijafa.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d678bcad4---zilovudaxemik.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210902122021.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/tasuzamixidulixobaxogi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sound+equalizer+androidPDF link annotation
    • http://irodori.kir.jp/files/file/22416183149.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_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11119 10356 bytes
SHA-256: ef19d0af47c2bcc1952ae7033c22da3e7488e723092e9a999cbb6acbdb0b636e
font_02_sfnt_off0001285e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285E 18504 bytes
SHA-256: 3d6b1748ae7a4bbd2af5470b39e89bc615dc64e8eb9340cc607dfa3fc239447d

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