Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fff7214b74de86…

MALICIOUS

PDF

74.2 KB Created: 2021-09-18 20:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5e30950b519ab766bfd5b5320a48b96a SHA-1: dfbcbed4f43556a582025130a6a0b862dd4316fb SHA-256: 47fff7214b74de8663a82e9afad7c769d78cac185f4c6d3491287ea6bd85e945
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, characteristic of a link farm designed to obscure the final destination. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document's primary purpose is to redirect users through a chain of links, likely leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bandotrading.it/uploads/file/71026262926.pdf In PDF document text
    • http://actinq.nl/upload/file/rigarogosimiwetamofifuz.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1630764047.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/kekavuxije.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/bojemimiwefoja.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/25535605401.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/36928632442.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/15734744520.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/62144104098.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/lutifapodomesalodakevere.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15797138118.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/vopamiz.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/27972803102.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/51547675245.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/voxetuzupomu.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/xasavanuxegaramamulanoxas.pdfIn PDF document text
    • http://specialcats.nl/media/files/95602629772.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210918091050.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/vufabawafirofo.pdfIn PDF document text
    • http://ihdbd.org/upload/files/vegafi.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/45911877816.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/9637e4e72129a6252bf674fa2cb36e93/68342091393.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=live+droid+webcamPDF 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_off0000c128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC128 16644 bytes
SHA-256: e0ea24e918f915165b2056453e22c00698e7da6741087dd2449d306d08c6190d
font_01_sfnt_off0000ebc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 10364 bytes
SHA-256: da9c676397573c02523520a549174eeb36815a89405b9cf97e5058340a2b5a53

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