Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dd7f6116ef3d23…

MALICIOUS

PDF

84.3 KB Created: 2021-07-30 06:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bedfd7d524fff7df1db67d954a39e917 SHA-1: 618837bd5086e6f7ebb193f845cebce4549d80f9 SHA-256: e2dd7f6116ef3d236dc1702c8d63e849f9353c0dc3fe62ad4738f73072262c11
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and links to websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection as 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a phishing or malware distribution campaign. While no scripts were explicitly extracted, the nature of the links and the detection indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3238

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://queure.ru/uplcv?utm_term=annihilation+of+caste+pdf+in+telugu PDF link annotation
    • https://mldom.xyz/web/img/podborky/files/75496861202.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/lutojetimofaz.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/4b0kfga3pneb2qhbbhnan2e28j/zisugegexekegetofitasawa.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/xowasipidipuzon.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/91542a7176f92c729f8c5ca39e63425a/69864234050.pdfIn PDF document text
    • http://jucal.es/images/file/zelewibatupavunolal.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/87048375216.pdfIn PDF document text
    • http://afro-safari.com/upload/files/72224021779.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/da9b8c976f7d39417361ee6e208a9a31/kemisobupo.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/bekad.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/befupupemufusijuf.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/74522746457.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ff8c80793---janipexamewigefomazus.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/b2e71cef6a763bf7a156bf1a1aff0329/rawuxolod.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/wikawofuboxopilama.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/59626009627.pdfIn PDF document text
    • http://bjallstar.com/upload/file/77280918354.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/8654a36a5eb333d3229f37c800a08e7d/kunasabi.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084bbac46264---namib.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/13cdkdnkp8kdbamqmtd364g1c5/kijexejiw.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ee3a1362844cf757d9bbb0d5d9c445c7/fodonixifusanofakivanumes.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/52537661022.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a84f6cf24---gevaguxerarefafewosi.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/mezibiletizatej.pdfIn 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_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 16940 bytes
SHA-256: 01b488164fc43967991062a1f1d21c16eef30697321355f5bafa3b7c99a73335
font_01_sfnt_off00011b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0E 10880 bytes
SHA-256: 4da4ae19c5be0488351f88bf8d39dde0d53c9ceaa7391bcfa740e5258f3acec2
font_02_sfnt_off000133f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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