Malicious PDF — malware analysis report

Static analysis result for SHA-256 08740ec269b60a26…

MALICIOUS

PDF

78.4 KB Created: 2021-06-28 17:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d04b6d0304aa5e6e40076c1cc49cfa1c SHA-1: 5f80f8687e93462e6606b091303d9dba721206e4 SHA-256: 08740ec269b60a264c3e4bab754c57024ca096f27f0a1c98fd3a45b7dd0b2e1c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains embedded JavaScript and numerous links pointing to compromised websites and disposable hosting, indicating an attempt to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it is used to download or host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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 https://nomylo.ru/uplcv?utm_term=2019+mechanical+gate+question+paper PDF link annotation
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/24449043883.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084920d57f4e---bawexeb.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b2d16ae91---93500439342.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/cfe0a4301e23f3e7014d9e8967ad8bd3/xugogezikubakival.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160890dd5554bc---38152713913.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/73af90a401988e582a3f414080f27c04/xidamenupinobinozefibeso.pdfIn PDF document text
    • https://globalquestconsulting.com/userfiles/files/ginuladojuzejos.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/40399612809.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768395c4407---sixodejurukozosifusoduv.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/11a2412c575e0838d329f404ac14a6fe/bajitogowelam.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/45100509973.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9692c4423---89365255789.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/zadamuxavokeka.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad58ad29c8---dumaposevowarotiku.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/69191732824.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/280616329104.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/wimolazelipujoterorodiwab.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/92539290421.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/rotozujewanad.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870e3c9f6da---towirowewulupumetizov.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/13913282001.pdfIn PDF document text
    • https://brakos.it/file/66264322873.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC5 17184 bytes
SHA-256: 943fbf655896425078a8ca822dd01128f22556c6f40d2f7817694ed3a1600676
font_01_sfnt_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 11432 bytes
SHA-256: bd3feed5fa60380a2e6d8e9eb603edbc1609286c89fd29385c1b7256fc10169f

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