Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb69e30ad077729…

MALICIOUS

PDF

82.0 KB Created: 2021-09-07 19:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7f70be1445c51cc137dc1ac364969413 SHA-1: 19c9abc15fcbe7e4232e253babd8b8282d67051b SHA-256: 0eb69e30ad0777293aac004a959cc755bffeb3909e274de58c434e6a1c587815
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple PDF link farm rules suggests a deliberate attempt to obscure the final malicious destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://naturallabs.de/userfiles/file/tisawesefepotimu.pdf In PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/52769549258.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/f69586fb916eaed6dbc47d859968a22b/kodur.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/cf6f7208043cd7eb659e634bcc2c2613/bomenizakakarekugetekevig.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fdf7b3886---66774643346.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8fef2ee267467464a5234970c9a48895/legofegewe.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/fagexadefexozidizegid.pdfIn PDF document text
    • http://lyshiying.com/d/files/gesodenagonedujopuwek.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1327b80d31---43875419448.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/bidugejowamedifaxewojev.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/72376114514.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1eea58929---zolux.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610608fe844e4---dukozeba.pdfIn PDF document text
    • http://runo34.ru/attachments/file/wobalamiwepufugebipili.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210725211951_988214072.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/a6bde34838e088c6db68a5a397529ed8/dojagoxawutugibulusu.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/80f77agjt897gv3oc4ve6btsc5/wuziliwobizatixenewow.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/2280769823.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/fimupagonutanik.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/felireranumoziwawosa.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/nevekosixex.pdfIn PDF document text
    • https://alohasafaris.com/files/tofinujegakoxamotaxej.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/35913691808.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/xisutowabitu.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/44683244732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=global+warming+adalah+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_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 17036 bytes
SHA-256: ebc5baa2dab09ee8c0f653b238cfc42dfa540c61c311924b261bf9be8d5e4f17
font_01_sfnt_off000109bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BF 10812 bytes
SHA-256: dae2aa71df36f4ae141817be99cbb619a1fc302c6906df15167ecfe43e633b9a
font_02_sfnt_off00012206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12206 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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