Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e07de1b9fbb152d…

MALICIOUS

PDF

72.8 KB Created: 2021-09-29 03:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7d1d1cf55e058fb2cdf95dc6c9c3e176 SHA-1: cfc931d0d3ced8908be95a781a3c6c2486fc5454 SHA-256: 9e07de1b9fbb152dc7ba309e1244d83cc7385c5465c38c26c41e75430a5101d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The numerous embedded URLs and link farms point to compromised websites, suggesting the document is designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the heuristics and the presence of many external links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • 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=pdf+to+ppt+converter+online PDF link annotation
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/70hvr6708ljtaaqvi5pmerda51/2573175229.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/vegosuvivulogupa.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/saniluv.pdfIn PDF document text
    • http://pb-book.com/user_file/file/62759895927.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/31245771874.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/47089920995.pdfIn PDF document text
    • http://danbikoreansj.com/uploads/files/furimotomitupemupazagiv.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/1da1k5sfbv4gad5psh04rv4jh3/25156031207.pdfIn PDF document text
    • https://tierlistei.ch/downloads/menoxikegemetof.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/miviten.pdfIn PDF document text
    • http://gardatrans.com/content/Files/koxogawabuka.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/sozenuwexozadiruv.pdfIn PDF document text
    • http://montesantangelo.it/files/files/mukudupagam.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/vebefusidepolupesofe.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/xukapuboku.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/60673187078.pdfIn PDF document text
    • http://www.moyekolodin.com/files/83236332323.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/dujekanuzuj.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/sawujuxizopavixenadufe.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/zebegijawiniz.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/xojetu.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1631043028.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a4556ece39---33001822615.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/72891833125.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/20706342869.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/vuwevewalizaxajap.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_off0000bada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 16804 bytes
SHA-256: 108621db5a0ab58226c58ef7e113b98ded8988f8d1a0e87ee4e428f71bfc12a7
font_02_sfnt_off0000fe1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1A 10348 bytes
SHA-256: 1085ba1a2932f1898eca43f7e7436972fb8b182c3911dd753b5e6e2df3b6ab6c

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