Malicious PDF — malware analysis report

Static analysis result for SHA-256 90214567d7286ce4…

MALICIOUS

PDF

84.1 KB Created: 2021-09-07 22:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56248fadf167b599355582e1dfff2efe SHA-1: eb5de74be2fa149600f674d208a10f9f7156a613 SHA-256: 90214567d7286ce4fd3a5aa93074fa887457b7b930ee981ea313b67007e2544b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://kruengrangthai.com/files/files/sobijet.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/c080cb28d190da2335bc3d27977ef946/56758085067.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/22501424194.pdf
    • http://asea-admin.com/_userfiles/file/20210718172521.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/a5c1f4682914d9e4d95ab2815dad11ef/biwawejezugujulobuwidokad.pdf
    • http://essiac.cz/UserFiles/file/92732642349.pdf
    • http://coomargroup.com/ckfinder/userfiles/files/lusitisilu.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jcdj10vi64d03027u4f89s2i21/24450937616.pdf
    • http://china-zub.ru/userfiles/file/83619520053.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7321235e4---13706129001.pdf
    • https://eternalbliss.net/file/20586439551.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d626d3a8f0---30997847131.pdf
    • https://proia.bg/userfiles/file/gasuxuraxifovisora.pdf
    • http://marta-galan.com/files/varios/file/81611031364.pdf
    • http://greenplanetnepal.com/userfiles/file/78837207051.pdf
    • http://andrelandberg.com/userfiles/file/39795056699.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9b830ef85---gomumituzibigitobirasuba.pdf
    • http://mcalesterhighschool1960sreunion.com/clients/e/e6/e641a1dc2b4fc8b0483efb779338bfbd/File/jewusepir.pdf
    • http://jtylek.pl/Upload/file/77005962439.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/63728502073.pdf
    • http://whatcanidoforyou.eu/publish/file/14177170835.pdf
    • http://dsraxys.com/uploads/18556538397.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=metal+gear+solid+5+prima+guide+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e49c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE49C 16792 bytes
font_01_sfnt_off0000fcb3.bin
e79bd523c877942de7b5f0bae5e52af50c6b68af416c74243a49047498386909
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 10964 bytes
font_02_sfnt_off00011602.bin
bc736e03affac2d08b4d45fd64fe8ac0f1e5d69e495d4ecea0fc706c6c85731c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11602 17120 bytes