Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc1567e9b2fd63c…

MALICIOUS

PDF

90.7 KB Created: 2021-06-30 20:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 31c9ff221a634cf6ae6f67a913cdb2a0 SHA-1: 806a34463365876ac26e490a30c86827db5f7c52 SHA-256: ccc1567e9b2fd63c6a6d1654b8095c7554740b0dbfb32c50497c600d284dd3ca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=game+harvest+moon+back+to+nature+bahasa+indonesia PDF link annotation
    • https://dodatnojamstvo.com/userfiles/file/30573471765.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dc2084ae7---13156449877.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/dhhi1o4qrdjghn3kpcp24589e0/nufen.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/ldi55qo6n2774h176a0id5h5ha/kilosawuram.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/poxujekadojonev.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/40008544570.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/8948c8fcd1eeaf11f765f2892f65a2a5/linesejuko.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/221156304065.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9057de771---pifew.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ebcjauikrbbaf2akgm76pfj40v/jegogagezoderurogilo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f2eecadbe6d0c9e2fe1a22138055049e/viduzexufoso.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/72088774551.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/b04252d8ef0f8c9ee968435a7379c534/44448608714.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bca52cfc8---43750007465.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/7f7340d317b130aa0a9a803dcd7951fe/ganuvogonobej.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9e6f1810d---43679393082.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080b53626d61---9784156849.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c855a9c7c0---64796590634.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/34170a52fbffd264907efc5080b174d0/bepiketudidim.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f2df8a209891065a7061f9bc88992055/79878307701.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbcd705fbf---617705817.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/5920642421.pdfIn PDF document text
    • http://easy2ticket.com/upload/files/91002549010.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/33600695784.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/naligapuvizivula.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/4b11521a07039acc13d30d1a388ca95c/nixoxomenedidoj.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 11024 bytes
SHA-256: 4da7d9712b8ff0f27e706b0f063250c039bfe2285d6f6357bbf7e0021115239f
font_01_sfnt_off00010a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2D 17524 bytes
SHA-256: 8baeb7329548b7cd11758a3a7302769027abb5394a2aa5e55a82c90296d1ca72
font_02_sfnt_off000137a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A8 3096 bytes
SHA-256: 4f6f587554ccaae1116c5ffac067a17b6438e0427d4c307f274596d7607dfa6e
font_03_sfnt_off0001445b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1445B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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