Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e6c83049d06586…

MALICIOUS

PDF

84.5 KB Created: 2021-06-26 15:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a10e7a81d66203e4e235c9e6808fecbf SHA-1: 3db0beecc3c3e3aa0c5ee99084dbad3be6d7f40a SHA-256: e3e6c83049d06586f9899ac18717e629ee3dd03b1f9c39b56f95590ed7124024
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external resources, many of which are hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of these links, combined with the PDF structure, points towards an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/999a28cc069cdbb3db591523e2d48389/gapawonalafufinidadexogad.pdf In PDF document text
    • http://evevoyance.fr/adh/.-/file/jizege.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8729c558d3---65712752152.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdb8db2494---dulinusajudijawuridapadup.pdfIn PDF document text
    • https://abeess.com/userfiles/file/xototosakamuku.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/b883cf448b80128378ccc32ec117f198/82646234283.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607029d22da23---xopixunipafa.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078cdb3de99e---jogolibalopovadivoz.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/mudorovo.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/9aec7e7d2b6ce3e70afaa5d73be75f26/vasijefolagovapogowobav.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/99761314642.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/o4085smtuas4i2npnaajudag1b/nanibevejofegefon.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/3df2c8570361487b1ff8e8a254d9fb16/tobivajonowolusanurikuk.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ad6efa76---lugujetisavisuwagelene.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/58495308111.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968e7fa9d32---10213824031.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/pagulid.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/tdh0e2rasjfideifo9vdddvc71/zikipo.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/876ab6b415ed412e98c1f1bf0855f794/dizarolowimomub.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/76248069188.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/cf87349a526c261ba61ec38ac9ae4217/sixesunapi.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6968d0cc424d805414cee71b0913243f/nomaboxedasarewogikal.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/040128104386.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/duvititabarejixoriro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=download+me+before+you+full+movie+hdPDF 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_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 16592 bytes
SHA-256: fd8610b0bc467a2a9bdd9bac7ba4c74e13250a587217206314437ae2e909ba55
font_01_sfnt_off000113c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C0 10860 bytes
SHA-256: 01e1e8b9868da0200ed6fcc908c553644eefa7dd6b46429b2f3e34140599ba6e
font_02_sfnt_off00012c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1