Malicious PDF — malware analysis report

Static analysis result for SHA-256 f280ac3720de8da0…

MALICIOUS

PDF

84.3 KB Created: 2021-09-17 23:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3405b2ee4749dfc3b4a6f2f1b52c28eb SHA-1: c496570a3c91a4c9f6f5b6d4fdfaf5c8653c4544 SHA-256: f280ac3720de8da0d7dfb6c33f69cd0d5ce3547f3d49a4ce3c36428354104d26
156 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting. The presence of multiple external URIs and link farm heuristics indicates a strong intent to redirect users to potentially malicious content. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a phishing lure or a distribution point for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ketchas.ru/uplcv?utm_term=pro+metronome+apk+full+version PDF link annotation
    • http://lidaoxc.com/upload/files/kitukilutorubujurazujus.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161408d4fc87f4---wufofujulanijefiwudi.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/wareduw.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/71585916811.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/be9b9dcaf42025754572c099b49f98d2/23673232962.pdfIn PDF document text
    • http://aweibel.com/Photo/file/25950082353.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/fojut.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16143c122f0e52---vukudakaxowazowabuno.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/55300863827.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/panadalusiluw.pdfIn PDF document text
    • http://china-guolin.com/filespath/files/20210902021337.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/14352391227.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/43361688581.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/31814665122.pdfIn PDF document text
    • http://chpcentre.com/files/file/dudobeti.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/17603230999.pdfIn PDF document text
    • http://mylodge-naoshima.com/susojife.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/96581425349.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/20708164673.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/babuz.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/40420695728.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141be98ab4c3---57731256129.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/taramakogeduvu.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/lusurojoti.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/58344595370.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/161368a5fb3036---ripelawi.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_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 10780 bytes
SHA-256: a8dafc8b1b3113b9f2ec984d906e63357a55dcd7a923d6be292c2ec7e9e013b3
font_02_sfnt_off00010e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5C 20044 bytes
SHA-256: d7d557d12a14cd44887aaccf859d42e96867382fa12d982b0d68f49b0fc064a2

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