Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4a88e84f0d22ca…

MALICIOUS

PDF

87.2 KB Created: 2021-09-22 15:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9040b610eb5757b70bc19c4610462f2e SHA-1: 66a85a75bb198de6c6a903652d7baed981d76da9 SHA-256: 1c4a88e84f0d22ca86d6c549316c3d0928794a4544bb60c183e0283e3a019177
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://synerhu.ru/uplcv?utm_term=how+do+i+watch+live+tv+on+firestick PDF link annotation
    • http://sreema.org/FCKeditor/file/56578981834.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/83505704145.pdfIn PDF document text
    • http://carszana.com/image/upload/File/4102111300.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/ridoluxemefawomonisimilup.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/xikekisedus.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/wobixuxug.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/13509133419.pdfIn PDF document text
    • https://thepainter.asia/upload/files/4395391708.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/59153647941.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/19031970057.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/85413509603.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/miponinokuboz.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/88171026464.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210919073004.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/sojebifenamulimi.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/taxotuzarapobotavomojewix.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mujefasuxide.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/dokajib.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/nutezubudazom.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210917010335240518mg9vp5.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/sifitigomedogedu.pdfIn PDF document text
    • http://preprod-proximeo.com/ckfinder/userfiles/files/42650454340.pdfIn PDF document text
    • http://jiab.net/userData/board/file/lusem.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/novaxerefomizolaseda.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/15760159325.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/12036558274.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_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 19272 bytes
SHA-256: cafdc207ea22e380141f79f252aa23ddec18f057c450984f7fdf68e27e57e53e
font_01_sfnt_off00011dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E9 10808 bytes
SHA-256: ce74773d0b068f1beaf6a987bd107847deec56872fbc11a9ea2f040f41569a87

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