Malicious PDF — malware analysis report

Static analysis result for SHA-256 be06b4e4b99ac86e…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 15:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d212778a1d1301fb6f363403e1f191d4 SHA-1: 6878b3b93c394276ccbd70cc64a1ab9aa340a131 SHA-256: be06b4e4b99ac86ee77c8d40629301c136400a07cf2c09b96c9cc42249fb5afd
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://nprofit.hk/userfiles/xapuvu.pdf In PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132493967792---27945000642.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/vewefogojijazasajaj.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/wavokajem.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/56886955732.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/nujoxejozosulonotomem.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210910051130365559ckth1.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/vewidepefifekobiwupaborom.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614238e9dcc42---sawokimasetaxa.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/29944009805.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/23566783859.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/91605978651.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vudilixat.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/fogokaju.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/80628763219.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/71709819486.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/59255525624.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/gawelibotuvimibavomi.pdfIn PDF document text
    • https://koratspring.com/upload/file/lagabotosedubamadegake.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/sagaratulefumewalewa.pdfIn PDF document text
    • http://kvrhousing.com/uploads/lipusinezulazenusifapiju.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/80327609618.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/lepukelizagaga.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/tozis.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sizajorabi.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/17249753169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+stop+notifications+from+websites+in+chromePDF 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_off0000d6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EE 10916 bytes
SHA-256: 053973165546561507b32bbc22830cae0f12c3c609944d710d22a53c844bf884
font_01_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 16332 bytes
SHA-256: 1f5630eaa4cbab81f748685a153079004efbbfeb63d650ea29558b3041213053