Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cb8a09bacd440a…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 14:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 613467d4d7d8e2fe63d5b4c5d416309f SHA-1: 4d0d85f17848fcfef72bfb2aeeb5601055f3f990 SHA-256: 96cb8a09bacd440a0532024fee0f308f48782c56d78d2727a47e417c44b5380d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised websites or are structured as link farms. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' specifically indicates links to compromised WordPress upload storage, suggesting a phishing or malware distribution vector. No scripts were extracted, but the overall structure points to an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://karinameal.ru/imgdish/files/regakuwibolojemovujosen.pdf In PDF document text
    • https://onwater.my/uploads/file/76525133544.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/judoreteworazasegapi.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/nivokezujefikozejon.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/15658045410.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b41642a09fe---webuwexekilumokisasojifan.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/sipiselegadat.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d640f72a923482f3977dce7ad49b41c1/9841034226.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094582b18314---xotizizikapa.pdfIn PDF document text
    • http://evola.it/userfiles/files/31930461725.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/69646578510.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/nilel.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/37542072337.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/xosawejunisok.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nisekevovemetujomolo.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/41771759050.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/61456445797.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c16add135---51280748049.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/dododebukukogatog.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/fdc31504074cfa31471a0c2cc01044e7/9680987184.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609483886b93a---pategujozi.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/dakagukoxasezakisanid.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729fab51a9d---67496146117.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/gavixajoxominegavatip.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/10473877904.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=fluid+viscous+dampers+pdfPDF 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_off0000d362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 17928 bytes
SHA-256: ce1af445a1f3a620d5ee39dea6f9040c835b519f5ec0e43145b24c13b0efbd33
font_02_sfnt_off00011947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11947 10720 bytes
SHA-256: 034f0be16236c73d0b5775d3822b7e1bb49c6f2e9da20024c0d18194e1f6ee37

Open this report in the interactive analyzer, or submit your own file for analysis.