Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f0fb246451a494…

MALICIOUS

PDF

84.6 KB Created: 2021-09-20 00:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b5c6835e56f65be1eb429d131792f31f SHA-1: b117a69922e8d34996b42d45e76a28916af7f510 SHA-256: 30f0fb246451a4942222b7e0f733537c88b372a9fbc9e46b08194efcf9bd6436
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous PDFs hosted on compromised websites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8bfd9ba7c---20633629169.pdf In PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e77a751c0---fuxepipasasulinopijin.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/kasitepixijezasitupewij.pdfIn PDF document text
    • http://jjc-dev.com/userfiles/file/lidanozolupevu.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/ratobugogeregomozebeseguj.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/34746985682.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/765442176.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/sigajobitarowibo.pdfIn PDF document text
    • http://rentaruedas.com/files/others/28285890239.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/maxovizoxokami.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/kasejoba.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161312c53d60b8---53443993654.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/bozafetatoxarugikatudupi.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/nulemero.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4d7e12af6fa825b9c29302e51299ff47/87463216769.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/87387068581.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/suvoresibefinubag.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/89846558327.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/97024070214.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b2c8d9a4f---38769251872.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161389ea06af5c---1062434197.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/30934816912.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/xulidedubamaf.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/14117939615.pdfIn PDF document text
    • https://bloc-immo.com/images/57025391563.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/gomawugetotazuwewis.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/47ce7723e4beb928d0100e54181f8038/28185062480.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/64245755613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=8+ball+pool+latest+version+mod+apk+anti+banPDF 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_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 10964 bytes
SHA-256: f29d532bd27e2a4be7b74fa0772c5df71944d682bcf2ff75cf7246e5ad0d91a9
font_02_sfnt_off00011626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 17580 bytes
SHA-256: eab257a74d8b75a507f74dcb70774b081b3ee08acebfe4b1a7bd4177ac726c43