Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce94667dee23cbe…

MALICIOUS

PDF

89.5 KB Created: 2021-07-22 16:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3033dbaa6eb554b7b3a5d0cb0f37db1a SHA-1: e64bcfc9fec0cd5df7989d54ec1f964b0b2b457c SHA-256: 9ce94667dee23cbe6fc7c258208d6ef85f7986bb6d65f76d6c2980123f29414a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains an embedded JavaScript stream and numerous URLs pointing to compromised websites, suggesting it functions as a link farm to distribute further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly indicates a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://anhbanglaw.com/userfiles/file/88839596266.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160984784599c0---21176193570.pdf
    • https://evergreencans.com/userfiles/file/2395391931.pdf
    • http://jncs.kr/page_data/file/20210619050314.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d31860b8589---93714724001.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/s4vmpf4lq89nc031448ak59ej4/21685823797.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/0djsscdppq25p88ijr4qjjjlkc/1493644480.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/v2iefjhms68knm936eqmo37gul/71290105192.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/nkqrod875iamq64nj80tc84s3q/59718178876.pdf
    • https://airshow-bg.com/file/sagopowudo.pdf
    • http://inspiredindianfoundation.org/uploads/jamedesakufev.pdf
    • http://dragonspond.com/uploads/files/berado.pdf
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/ledoxemekupof.pdf
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/84050726025.pdf
    • http://kaushalacademy.org/ckfinder/userfiles/files/wixit.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/4a64938a8b6bf7d0e4f44b91be019964/wazowovudazozitibifas.pdf
    • https://codecs.ro/images/file/47060468171.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/qbfgbeo0k9jnm4j48sf6ufj2f5/76893394156.pdf
    • http://aelma.com/sites/default/userfiles/file/88555808306.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/b01793819219ada845f0d98e6ee7e194/nubewawu.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/a34712cce74ca59e35257cfb67a59c1d/86023617910.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/q96nblj7cnh261ic39khuch7d5/wazukutapinewitokazobij.pdf
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864c6c74f4c---domamisixumo.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160ce37c87cdbd---timaxivowanedidazikinera.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/warunokub.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=stardew+valley+android+download
    • 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_off0000fa6e.bin
4d6b29285d69fb40b4e3211656385fa1edfbd508ab645b44494fddc7dc562d0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6E 10412 bytes
font_01_sfnt_off0001122d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1122D 16792 bytes
font_02_sfnt_off00012a3f.bin
9693d2996524913ca7d0437f5ae827e32c592f6b8fae042017392eefe4853fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3F 17072 bytes