Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e4a09f49749a06…

MALICIOUS

PDF

85.8 KB Created: 2021-07-08 11:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ec766231044f93283404d8348577ea9b SHA-1: 08fa68001c5df058491d2900cc99a6acd0e6ec1c SHA-256: 00e4a09f49749a062f579236b02cefdf4d0d014eb99b6eff90c351c79ffec3ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the nature of the URLs indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://laborke.ru/uplcv?utm_term=codes+in+all+star+tower+defense+simulator PDF link annotation
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16094d1b3e11da---seduxoseliroguzeveli.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/7c67f6b24775b85c7b44b1d8d01b592c/6169228638.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/xijomoju.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/a1cb3a77cb02f0ab9144dc3cdb62599e/31601182287.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/bfa0eb18bd2ec9a3a213f17ab5f5bfc5/xinegugafutot.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/2722254555.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/9741813221.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b8b31295---90183231469.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/tajofok.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa02c7eb6---52438682225.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f77337fa1---zivovamelipigarukow.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/sivoviwujozeriposafigiwa.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/30757702459.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16087e3d17e296---54845374861.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609842efee84a---jejabufeju.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/buzejulawofadamorimur.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdaa64a3c8---zafepum.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160863aa5cc182---82429822189.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2651674fe4---bemuluderefejujugup.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/d4a563cabcf05792ad3a3680f3bc7710/84067083158.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607978a72c1f9---91294490603.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_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 10732 bytes
SHA-256: 407ee42be2d4ca0104ce5511b1d1144c536d28f61e0729e4a82653d74a46141e
font_01_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 17652 bytes
SHA-256: 771fbc02d84dcb9c1b188eaac0135dda7d1845d03e7afba91d6ad6a04e36e459

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