Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd104adf6356f58…

MALICIOUS

PDF

69.3 KB Created: 2021-09-17 16:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bcb7907f000ec72e059e9c07dd35dbce SHA-1: d72c4242498defeb5d3f01afb8ab418b3ce78721 SHA-256: 7dd104adf6356f58e58beab78bb7d183eab7311acbe0a81d00df308101803f96
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating an embedded JavaScript stream and a link farm pointing to potentially compromised hosting. The presence of JavaScript suggests an attempt to execute malicious code or redirect the user to a phishing or malware distribution site. The numerous external URIs, many hosted on disposable domains, further support a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://harshahometutors.com/uniformkontakt/userfiles/image/files/puzef.pdf In PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/86567925905.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/61413403717.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/32703064349.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/1g5eadciilhb6hdv7dq5krv7oj/59181079479.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/wiminusugenusodadegasiga.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/fitisipoxikexotixiju.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/puxetasexokagijemuratodum.pdfIn PDF document text
    • http://enewind.com/pliki/file/2088439496.pdfIn PDF document text
    • http://ridendo.cz/files/file/49856419404.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/nudetogexupolupekijanu.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614007ce518b8---74635724799.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/fasajur.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/papolebutuwixoloveme.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/tanojeso.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/24549336789.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab48b6b809---mofafabopetefareve.pdfIn PDF document text
    • http://imaginove.eu/data/Files/wedesofokowiliji.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/guxotebewixojorifof.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/57414789054.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/fuxepasu.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/gemuzidif.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/85416743969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=farmhouse+ideas+minecraftPDF 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_off0000b182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB182 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC994 15044 bytes
SHA-256: 98a5d89a120a81264f8edcfd9650b518f1b07f66cdf9c1ade01e62b937b88b9f
font_02_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 10772 bytes
SHA-256: 3fc0d38509d0e5888ee387663acd84bdeb2d725cec42bd834a791c09f90e1dcd

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