Malicious PDF — malware analysis report

Static analysis result for SHA-256 2183ce02b4e2daa3…

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 04:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ad5d0f77ec265038cd11dcb7bfa513d6 SHA-1: dd2cc6536a1eb682e693b4cab9ae9acc90ec49df SHA-256: 2183ce02b4e2daa39816581d675b705c18ab56e2b4db27d984c9953e14338fed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The document body is unreadable, but the presence of numerous links, including those on disposable hosting, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/86490802711.pdf In PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/27772705487.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/66016043977.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613787260e11b---lezimudanunadexotuzewow.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/69309856759.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/lujuladabujelenapavuzedor.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/pukopejikisobowufidora.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/e39f54df6588c21403893a5f717f51e4/22192664400.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/bejamevijajovalup.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/nelasozilekexagojulit.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/52248061069.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/46920917585.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/funidijebivugelaw.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/wamiwemejijekegedamuri.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/50820111677.pdfIn PDF document text
    • http://specimport.by/files/files/bekolizutigoxixiwu.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/tm0tq091tl1il1q7citjt3bvu7/sosukexujovo.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/81363469348.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/repakukenoxig.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/90459951437.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/64523123478.pdfIn PDF document text
    • http://fitviewer.biz/files/file/28588773482.pdfIn PDF document text
    • https://motoralbini.it/files/file/rinavosezedisogakepigi.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613408dcc5808---zinebatuzuda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=marvel+super+heroes+apkPDF 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_off0000dbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 18196 bytes
SHA-256: 6bf3c8c3027e57bd028d09b16123146d4062aaee1bd0890314e73e7d24c60297
font_01_sfnt_off00010ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB9 10308 bytes
SHA-256: a89b4d8dea84ee00326a976423ed8a1541238045c8dc383e2b8d8b8b820cdfa9
font_02_sfnt_off00012227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12227 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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