Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec0f9434668f347…

MALICIOUS

PDF

77.9 KB Created: 2021-07-02 00:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59f0fc772c29a45f1b54e373547cfe69 SHA-1: 8ba9c343074175e06a4fe918e26e4a2f1570b026 SHA-256: 1ec0f9434668f347690c00696f2156cba5207c42f4467f30dc429e914188b42b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to manipulate search results or host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/0298f3e36805263a1f3ed89875da9e55/zotuxajowiferuf.pdf
    • http://aarogyamedico.com/userfiles/file/70243693225.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f77729aa0---428616584.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160764aa919f59---44817547954.pdf
    • http://angarakshaksecurity.com/userfiles/file/xijokotixazob.pdf
    • http://accessiblevehicleservices.com/userfiles/file/judupugunitusejerazal.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/b86bcb15848060d109f79f16c63c9cd6/nodafibovo.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/628188c3b7c40768d2d23ccabbc7e4f1/54309999006.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/0e2a64c0aa22dae821461bc8080739a5/demegonopejefuwapu.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea72cab29c---lewetogapuwo.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/cf467e095925e37b5fb144622c30c048/33158809521.pdf
    • http://studiospazioambiente.it/userfiles/files/welavesukagewuzotutolavo.pdf
    • http://newo.ru/files/files/sogelavijijurazivumat.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/jgg5ppr1tsb46vkcsvlhvejtb6/pebamelura.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe7b09f952---71583573749.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/plo6fajrh0nldiga5sqmbbk67m/lafilewulesudifujikonuv.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a701c9d079e---wapozelitujigitumibelopa.pdf
    • https://eobliecky.sk/userfiles/file/52367236982.pdf
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/20631876314.pdf
    • https://novahealthclinic.ca/userfiles/file/lixipujotulesesukazizo.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/pffnqs0q0p42mkc4bqma7mtlba/93747007188.pdf
    • http://getem.plfiles/file/379404499.pdf
    • http://antifftech.com/uploadfile/file///2021070104333713.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=film+synonyms+quiz+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc4c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4C 16792 bytes
font_01_sfnt_off0000e45e.bin
c968cd54b279898cf6fd33757d8a593a8147b1d370b8ce103c863dcc410600ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 17196 bytes
font_02_sfnt_off00011164.bin
46214817960009998a84990186d37b8a88c51da2257acaa27bdb3467e7ae373f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11164 10856 bytes