Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0114385412cbd10…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 01:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7a039c72b8479ce478307fc6961273c3 SHA-1: b07db97eaeed157bda17bf9b288f46a3201e3c96 SHA-256: c0114385412cbd10eb25612891b98f986dcc4ef6db06b536c306d224cb5475ae
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs that point to various domains, many of which appear to be part of a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern, suggesting the document's primary purpose is to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://inwebjor.ru/uplcv?utm_term=ra+one+the+game+apk PDF link annotation
    • http://gruaszarate.com/ckfinder/userfiles/files/negimugixus.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/23085590004.pdfIn PDF document text
    • http://porpora.group/imagenes/imagenes_contenidos///miregeveme.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/48739841835.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/zumazikes.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/83629640940.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/292bc77100054fafc41a80b05579de0c/40688195321.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/4vbm929fj6eji7iv8vdpm81u2m/81434102413.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/15998057101.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/jumisemuzolejadapofisid.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/vavisumirikemukagin.pdfIn PDF document text
    • http://smogy.ru/files/files/xamosizadoseril.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/4398302373.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131f420e0881---41495893201.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/98533304698.pdfIn PDF document text
    • http://guide-eq.com/userfiles/file/20210908161107_mz25j6.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/74476886052.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/garidavip.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/jowetoxirom.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/jiweliwabafinusadezavi.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/37279837647.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_off0000aed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED1 10428 bytes
SHA-256: b2459489747010522802657a61dce28a240f4becabb02300985d5dab9fdabd1f
font_01_sfnt_off0000c64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE61 16096 bytes
SHA-256: e57bda2449259ccf9607e167d65b5cbc8c8d3127f1e306840dce0c305a42cc8f