Malicious PDF — malware analysis report

Static analysis result for SHA-256 3386512d6b810b8e…

MALICIOUS

PDF

85.0 KB Created: 2021-08-30 07:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d8c218e3cdf21458576dd572a37053fe SHA-1: 7cc30c1970121aa6145fd0526338e3eb54a3f8ff SHA-256: 3386512d6b810b8eb0f7f0d15ef36087666de54fdfac5226072053c9e53364d3
156 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://lateonsettay-sachs.org/userfiles/file/41100941798.pdf In PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78bff97a75---35823185010.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/jizirejebe.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/380e48f7b5956ec0f6cef998568a2b47/26473225570.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/vdvc4s2nf06d4g5junqj0cu4t1/jibezonirikon.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/25829290969.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/1ombnd61tooqda25vs756hlvi1/bisixinutosobuta.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/72537934347.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/2b1b10b8f033b30fa4c4dec0e800eb85/kiviganuxogexag.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210713200341.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16098843fcc8d4---64393156387.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/bewutamasujexerex.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3bd0b3121---dikitakuredopijasepax.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/katimokulexilejatuvut.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/21196127400.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/xoduzikasiwixetu.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/fupoxibutibukazozitoro.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db07f2543d---mamujitovumapa.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/65353492252.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/wumeburi.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/26810509938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=death+in+venice+full+movie+freePDF 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_off0000e485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE485 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC97 19036 bytes
SHA-256: 1ed3e926ac741a0ef4a50b8ae44743e01c90ca4bd2014b3b26810590b4508743
font_02_sfnt_off00012eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBA 10600 bytes
SHA-256: 7e320473d655ff60d2f505a658e9d947c1e4318fc22905d88038c837f9fa42d0

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