Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f08efc9c3bc324e…

MALICIOUS

PDF

86.0 KB Created: 2021-07-09 01:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7594d8924ad35d4cc29661e481f793ed SHA-1: 3f1b0eb90b274c47bd642587fed8b9528574ae54 SHA-256: 7f08efc9c3bc324ecc79594e81bce805a8bb8996615d522cf457d4f47245d828
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://catamma.ru/uplcv?utm_term=batwoman+crisis+on+infinite+earths+part+2+full+episode PDF link annotation
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e212a15e094---ziteburakofenugamof.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/wumavedizuwiwevefebak.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/newinubav.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/lowibojum.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/35809810026.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/zikodewegorapulepadisa.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/626101412d6e7a4f476feb06d56b8a42/12894171233.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/digabazikowo.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/3173182626093a79bdba9b.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/9395893840.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac6535ab01---najoxinitezaxoxu.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/79432359647.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/10056912279.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/gibubukututelojora.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/rokixiwuni.pdfIn PDF document text
    • http://aven.su/userfiles/file/musovegomexituguna.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/6267837155.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nabukabesazof.pdfIn PDF document text
    • https://parc-hotel.info/file/84447002258.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/zalejobodonadofa.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ad2d356ca141f399b111c4ce68a66ba7/bowuragaxelavagoriw.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/bisodutitimaw.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_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 11244 bytes
SHA-256: a8e283adac92ed75b3a087e2bf70bafae7a98e37fd73b23f8c366c6718eae889
font_01_sfnt_off00010563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10563 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 17600 bytes
SHA-256: 64d451cb41db7d885e7572e545bd0c9f9c07ae71c7cbcb592dbc09a9c5ed8bca