Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e38fafd9904b2ea…

MALICIOUS

PDF

83.1 KB Created: 2021-08-01 10:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 60316fa958400d0a1330f445b0009ec5 SHA-1: e5942c9ed91f0b2b27ac213c524c3c08ba961cc3 SHA-256: 6e38fafd9904b2ea09d77f2e8b0d4f604e978b5afe2338ee14f7326168e79d63
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating its purpose is to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://drafthe.ru/uplcv?utm_term=download+euro+truck+simulator+2+android+1.30+passenger+mod PDF link annotation
    • http://bangkoksolarpower.com/syner_upload/images/files/82678917021.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/monobizigezenixa.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160abe5839cd35---kirerawod.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/pigusegul.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/90033719452.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/69dd69f805e5886cad66de552d2b6e8d/rakep.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3422e79664---veragilivozeke.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/34f2b9073d26b7b4e022edffc597972c/modutifimowalulosimedi.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d49dc5ebae---wedefubuxokidejamotaboma.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/giponazutiwenitiw.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/pesekupuropaselovexewejas.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29cd2c0c70---71454422664.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/7726513188.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b1b646ebe---givafolovu.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/tq3e5pml4g7loag224h7qc8bdu/94668393737.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/97535862216.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fab509b314---91441149062.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/17564854138.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd0f59a232---gikodatupa.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/07/16/file/20210716_022927_116.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160acad61770e6---sugojo.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f9a77382f4c---7785126370.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160965e9b988eb---zodixusok.pdfIn PDF document text
    • https://aromamarketing.md/img/files/62263401778.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_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 17912 bytes
SHA-256: 986fed417c24c41592adccd4002fd4e1e31d03dec0ac8bead87ae2ecd36a702c
font_01_sfnt_off000109b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CE 11668 bytes
SHA-256: b099d6c72b903414978f52b99d1073603b39535e4e722462df8c730179ef5292