Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea5c7dd05ddeacc…

MALICIOUS

PDF

81.7 KB Created: 2021-09-16 09:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fa9a6b078a33a6ad92d7ae0ca292b44d SHA-1: f22a66b7aac57a98eb7724bb221ac5eafdaf5ed6 SHA-256: 0ea5c7dd05ddeacc587b14ec54f32f228e116fd8645050d44d7c700cad1235d4
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of a fake CAPTCHA prompt (SE_FAKE_CAPTCHA) suggests a social engineering tactic to lure users into clicking malicious links or executing further actions. The document contains numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting, increasing the likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://synerhu.ru/uplcv?utm_term=mi+account+unlock+code+link PDF link annotation
    • http://sanruou.com/app/webroot/uploads/files/96644769399.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/75300761478.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/lanadilolevefekosojolezip.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c07ec537ae---gigupunerojodesuna.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/nexadozovakoreloxilotitef.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/wiwitewukux.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613abe1c93186---81413144377.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/bavexadavaguzaxirovep.pdfIn PDF document text
    • http://rvhifi.cz/files/file/kififusobufegewolovora.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d4b2c6471---dofevudem.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cf8d084f1---luvakipenukidizetanebo.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/fiwulemigixik.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/8954367064.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210908111218_sbc3ox.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/sedogenulal.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/82622360012.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/xikixufu.pdfIn PDF document text
    • https://mkontroll.hu/File/bizidobitopilebot.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/0ttq0trp9on8nj8b3p21abu49b/xigulemupunabitisokotalan.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/wenalisis.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/wanefu.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/duzogoxigoredujoxirep.pdfIn PDF document text
    • https://alpinashop.bg/files/8246853957.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/f98b2232300e93609779f2b0d62dac6b/93176543954.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 19016 bytes
SHA-256: 8f638e90d757c4269f815fe737742d51de7075b2a7e9a80ab7914a1f3729995b
font_01_sfnt_off00010a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001222b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 10280 bytes
SHA-256: f3a8df1f3ed99aaee5607d6f7cd590e055a8c56139b6c49cab8fe56184ce372f

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