Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1a48b8eb4579cb…

MALICIOUS

PDF

72.4 KB Created: 2021-09-24 22:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3c9e29898a402510354cd41a4770e968 SHA-1: 59c5d991bd3d03c7856283a0175f0dd558b2ade0 SHA-256: 9b1a48b8eb4579cbeee67d3ff51a393704bd2c88f657e54b8d6508b5d600be92
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many of which point to disposable hosting and are likely used for phishing or to redirect to further malicious content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically flags this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://pixomot.ru/uplcv?utm_term=ascended+blade+of+awe PDF link annotation
    • https://pierrelemagicien.com/userfiles/file/wuvezitoni.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/nefekinare.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/daxojekujobu.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202109082214002226.pdfIn PDF document text
    • http://webantikvarium.eu/tmp/44011960144.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e4b8b885c915e118f3456e4570d0b29b/93790283224.pdfIn PDF document text
    • http://yoron.net/up/files/30449263089.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/84038117973.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/bonefagumipoferabozubuw.pdfIn PDF document text
    • https://premiersuli.hu/files/files/wiwexa.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/zoxup.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/fevefidisiwur.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/numaxawex.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-4/20210904021951166797.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/jezivatutogetumufuw.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/sabusul.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161418bf550679---tonibipezonutegolaxaxapof.pdfIn PDF document text
    • http://matras-devison.com/upload/file/taxeguvezefevabowewadun.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/88979296851.pdfIn PDF document text
    • http://oris-am.com/editor_up/pavugutabimejeri.pdfIn PDF document text
    • https://arerp.kr/data/file///91192214398.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/pukikofixadu.pdfIn PDF document text
    • http://nature-revive.org/files/file/68504712286.pdfIn PDF document text
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/zifagixeka.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/50911254998.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_off0000b519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB519 10388 bytes
SHA-256: ecd0b5b9bf8d7586950c0cfb54294130141ada37a31e5979e858d785a47c099d
font_01_sfnt_off0000ccd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD1 17516 bytes
SHA-256: 76f3cbc1f0710466bb6c566d83a7331e5e98de5373d3b1bc1733906e03a779c4
font_02_sfnt_off0000fa06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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