Malicious PDF — malware analysis report

Static analysis result for SHA-256 1036c6522762d053…

MALICIOUS

PDF

86.9 KB Created: 2021-09-10 03:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 7612c8b7bec9550f4219a970476d7069 SHA-1: a11c5273a026ea73280f3555ff8cac88cba3261e SHA-256: 1036c6522762d05370aff29200d393f49c210fe5ae5d91a730fbf13cdafb7ac2
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://milwaukee.center/userfiles/file/gowodox.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9d664f300---70178938123.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/rezatuferipon.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/26406292940.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/72719050214.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/74600489800.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/38347440874.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/gofidepabew.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/84974928235.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/tijudazafoxetenamezera.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/lenokojamevadafe.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/zogawe.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/gexilagegin.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/terit.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-6/20210906123144432620.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/rugapikixiwomig.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/pitabupibaxejoxe.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/74887025407.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/54618244542.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9a73bf8cb---13968221582.pdfIn PDF document text
    • https://kaunas.cvzona.lt/resources/img/files/89882790132.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/pexazoxawawukitawuketelop.pdfIn PDF document text
    • http://apex-architect.ru/images/file/bemozopiwusubulujudegax.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/giveretitevibiwafafuvo.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/59310793863.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=stop+motion+video+pro+apkPDF 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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 19300 bytes
SHA-256: e83a82a8f4dffe40dc05717877dacb04149b32ef4a583407e87470776d9440fc
font_01_sfnt_off00011dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 10572 bytes
SHA-256: b46f4756c09d6fb4aad40d9dfc2d7533ccd1e025bcf61baa0d0a04aca2e478fa
font_02_sfnt_off000135e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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