Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ab94dbcc3b0743…

MALICIOUS

PDF

93.0 KB Created: 2021-06-27 23:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 451afdb99d0dce872d5151f4f76bb269 SHA-1: 97d2861ad46463372e819ee14c8da216d1f36e26 SHA-256: c0ab94dbcc3b0743dec5b663a000f2e96ed8592a8484cec0b99165336c08b798
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 https://eventspicer.com/ckfinder/userfiles/files/vonazozizuwosaxuzox.pdf In PDF document text
    • https://szekszardportal.hu/userfiles/file/zarap.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/tuvutuvufenimolisenol.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/rajuwomab.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3624643b50---furunuketoriw.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160ab68d6e270f---14375419503.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d028e3c4c3---tabenasisetubumuxidutes.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4e58047014621a8d65f81bf1f3dd1c9d/sukivalixejopof.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210507013100_698233635.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/b5796cbd26a7c1057a21345585566817/ludakuwurefik.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba385ebe5---kenonekisegifawa.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1ca4418979b47a7cf24b96163af41b71/sefijapejur.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/sitasonapakonesumixojibo.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/2255294855.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a932e3bed19---13735977962.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/42785562869.pdfIn PDF document text
    • http://abpaluso.com/upload/file/20015380397.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///wuzumepefi.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a95bd06892---xekenugijapomopejute.pdfIn PDF document text
    • https://orrizon.ru/images/file/kamugodofisanosojo.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/74411225631.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a583b5c06---kazuburigapexam.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/geriverufidovusa.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/8061972099.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/d01dk9cjf09s2ogv86ter65tei/misibugezibalidufaru.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/82143797292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=best+action+monster+moviesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 16868 bytes
SHA-256: c977b49c6cd4febb2748fac75fd1f01d9a1de2904f7669b91b7047f6fb6caad2
font_01_sfnt_off000136ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE1 10464 bytes
SHA-256: 987682a5f61bd6bc0452119140f787d3098eeb3084f9c8cf894c4cbc1d0a7396

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