Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0754bc853b0d15d…

MALICIOUS

PDF

84.9 KB Created: 2021-09-20 12:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5020d4914682a917e01d7c7643b4e02c SHA-1: 61fd5736d6b2df9dbdb327e9c6f34e51c6389bcc SHA-256: e0754bc853b0d15d2da0b87fe7884186feaba41c0e492aed1aba727600d5c6ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan threat. It contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://glavis.biz/userfiles/file/kibaradevaroxinovixo.pdf In PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/vamamomuva.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/11959429695.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/63524834839.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/53646741249.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/19120044250.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/damurek.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/vizowuti.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/nofisobofa.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/degegatojoburapazo.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/85721597557.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/10314395029.pdfIn PDF document text
    • http://sns.hu/_user/file/26462174564.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/rizip.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/kagamonalu.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210906194920551.pdfIn PDF document text
    • https://priscar.com/documents/files/rerufoxikalixinikudawevup.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb8d8df4f2---15151932074.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/13953048392.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/31647910061.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/dukavozirakikopubajur.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614125e5ad4c4---58833055151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=go+all+the+way+tabPDF 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_off0000e6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE9 10120 bytes
SHA-256: fc790aa062ce27d4d798972dd1716de8d1719f1ccce0a8f7052ce3e5ce5f7c63
font_02_sfnt_off000115c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C6 18688 bytes
SHA-256: 594e725692270c86b85be1377f7ef97ef19b94b41155f0ed96b7fea50d9766a7

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