Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafb749ed301e872…

MALICIOUS

PDF

125.2 KB Created: 2021-09-06 06:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 392da5855aa9e6583e32f7d0ccf80e07 SHA-1: 06bf10bde03e93e91092fdcde8523fd9dbe7efeb SHA-256: bafb749ed301e87278c8e89a6e36c5e72983ed9389bc6a4e406e1d80d50fe12d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories and other potentially untrustworthy domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e1a7e792f---71779042914.pdf In PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/baxupojukatowipepurome.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pizorufojedusonitujo.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/763816dbb2ee6206279ef40ef1820805/34213886748.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16091726a9b12d---73000268021.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jlki6io1ajkro25bgjhedop8h7/berimibunesebaganav.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/94896167363.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e686bcc9e33---wobuxifunine.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/35345765082.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/39504201413.pdfIn PDF document text
    • https://etimes.mn/uploads/files/96995456648.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/46576609052.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/35793499112.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210622134349.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160adcac29af4a---30241398586.pdfIn PDF document text
    • http://vo23.ru/upload/file/9222612395.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f7j6sjh9acfo7h1m7hj5pr0p6/bivirajapademebofigiwuva.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611547c2951b2---96290099628.pdfIn PDF document text
    • http://stonebriarranch.com/clients/876969/File/74328560499.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a6494577---36574260437.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/23025341429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=mtap+reviewer+for+grade+9+2019+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/bfe6a99913d358276f61506e09efa12f/40751807628.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_off0001818b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1818B 19740 bytes
SHA-256: 2d2710cdcead9c241407f2548ec273b43ea8c94c07b73af3212f97d9bdfe695a
font_01_sfnt_off0001b5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001cdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDBD 10960 bytes
SHA-256: c76526819c0e1a7c7ed95b0d39bf07bce43590bb5d290a001ee3669c9b29d835

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