Malicious PDF — malware analysis report

Static analysis result for SHA-256 f399afbbc489a89d…

MALICIOUS

PDF

74.7 KB Created: 2021-08-28 08:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c29ba8ec13bdcda27867ac398ff7269c SHA-1: 1cec36a05f514f767f77a6d77dafbbf1baedb37b SHA-256: f399afbbc489a89df8654a3406c9beb5e33494a02d90471935d4ddab7f1008f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable domains, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a social engineering or drive-by download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://allytemp.ru/uplcv?utm_term=free+svn+client+for+mac PDF link annotation
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/rodetezurow.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86e71eff98---82156621794.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/6720069748.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160735d31e8572---88431220809.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9fbvd3vqk153oebk78cg83m874/gufexipenabudutujasotaxis.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/4f8bjbmvcmc3m6sqo4r57oqp9s/polutefudosasufigoz.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/44312976799.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/memofijebivokanawed.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/lixazizonokakufixejinosaw.pdfIn PDF document text
    • http://web68s.com/upload/files/negelujofugabivegogofu.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/82545838170.pdfIn PDF document text
    • http://royalgroup.at/tmp/23061043119.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/rapegaxuberi.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16112ee01c56d5---dopizafafiserimo.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081226665f41---47966609209.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/13172856521.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16115de04516ba---25105303893.pdfIn PDF document text
    • http://sme1970reunion.com/clients/7/78/786f1e38e9ed540b4a7d4f5dbcc09398/File/vekesurosesosu.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/161140d262fd65---bororifu.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/pepitodafazuzokawovox.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/danela.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_off0000bf49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF49 17476 bytes
SHA-256: 9f4e697d2f77def4a5a93b640d5d2ab02d68a41692ba22a85cd75d2e3acf8324
font_01_sfnt_off0000ec92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A9 10540 bytes
SHA-256: a96071e7311dc846abf67b29a71fa6e95b9eac6aba6b47bd1add3ef077f801ec

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