Malicious PDF — malware analysis report

Static analysis result for SHA-256 241ee8017e4e593f…

MALICIOUS

PDF

73.2 KB Created: 2021-09-14 11:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0f19e2162b073232592e1a8ed2552399 SHA-1: 764900f5a71c947224461dd2463a798dcf1695e3 SHA-256: 241ee8017e4e593f1bc8cb7169997c166c3289a96bcefe5121d184cfb65a6b48
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of a link farm pointing to compromised WordPress upload storage and numerous other unknown URLs suggests an attempt to redirect the user to malicious content, likely for phishing or to download further malware. ClamAV and ML classifiers also flagged this file as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135504e25049---batagejivup.pdf In PDF document text
    • http://littlepearlbooks.in/data/eimages/file/45486457584.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/nazegugak.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/pigatuxaridube.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/4050117102.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/diburuxexonoworitoxoro.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/cd918d6b3a4c53b56321608d2224a108/pijujixominuboniratipok.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/zomavupogusape.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161337808ed637---24894862070.pdfIn PDF document text
    • https://fivetc.net/uploads/files/gezexafixaxovekubepulo.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/g70ircd3bjv36093rcqduqv8uc/vutuzapezej.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109011410236087.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/36965459101.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109051705065508.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/ridegasunas.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/torudizuwosuzomobitesagax.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///mokepamolofar.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/kasovokenedilutobexeko.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/54069600708.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/fajelefiv.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/31435541681.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/giniwino.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/fagezixabinafumex.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/ragiwegaxebaxije.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/41332035269.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/rovubigekemipodesosifefip.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/mitabezifetetil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=words+that+start+with+a+thPDF 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_off0000beb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB7 10144 bytes
SHA-256: fe98f853f069f40a7a073d461c320341cef7f61346070ad74d83460daa284b15
font_01_sfnt_off0000d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 16100 bytes
SHA-256: 05775215540adda5eef940ad3e6a2082cbf537973a11d4f891598e8bcd2a8bd2

Open this report in the interactive analyzer, or submit your own file for analysis.