Malicious PDF — malware analysis report

Static analysis result for SHA-256 7125d23b933f0479…

MALICIOUS

PDF

85.6 KB Created: 2021-10-07 19:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 36f93b8005f5a99e7fc5ebceed3d4912 SHA-1: df00a377a5621070c1a6e49e7f492681ab00800b SHA-256: 7125d23b933f04798c8360523eae95aa2b8d61ca6cccedc046bcc9aeef9a5123
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an attempt to redirect users to malicious sites. The 'Urgency / deadline lure' heuristic further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://songhakbbq.com/uploads/files/lamavogasal.pdf In PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1630566073.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/mexubanapemev.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/10536834853.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/wujewo.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/gowebesegevasijane.pdfIn PDF document text
    • https://portoggitter.no/content/files/userfiles/file///nuwasado.pdfIn PDF document text
    • https://webmenuplus.com/images/file/65176660595.pdfIn PDF document text
    • http://jawarakreasi.com/file/50671850212.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/598535365.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/39695215587.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/xexopudomonupimu.pdfIn PDF document text
    • https://photojet.net/userfiles/file/66926624247.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/buguwegedasoxurawimanedix.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/ratidokajezoxa.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/simemogaren.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/58280945654.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/jusepixigomuda.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/kojukogedajukolugumilil.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/41644454429.pdfIn PDF document text
    • https://phukienbep.net/media/files/78292924887.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/retajatulirivuz.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/vimopowowitepa.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/75417608378.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155bf99d9d58---30163259847.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=fun+multiple+choice+questions+and+answers+pdfPDF 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_off0000e727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 18152 bytes
SHA-256: 153a7b5433373e7595534f322582a2e1a1b677cc04893f8353d9268b31758d7e
font_01_sfnt_off00011654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6B 11192 bytes
SHA-256: 659aa8b982caddf1623fad931e188a87007e45e99e4394610ff8b08a9d5f9477