Malicious PDF — malware analysis report

Static analysis result for SHA-256 76da475d201e692b…

MALICIOUS

PDF

85.2 KB Created: 2021-08-18 16:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9fea37f176fae5b2442b1278180a9983 SHA-1: be80f16850d07754972e051f46b3cf906545957e SHA-256: 76da475d201e692bef09536840beec69f9e84930c3513d162bd10e9eaf3f62c8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised CMS upload storage and disposable hosting sites, likely to distribute malware or facilitate phishing. The presence of numerous embedded URLs supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gonvvama.net/filespath/files/20210814134610.pdf In PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f3edd07dc94785a391cbe5a4a9519c4d/48518002606.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/11658004781.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/16400666459.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/8cf43d4afdaa2e3ce84b774c064b182b/xesupatodok.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/tolidaxujano.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/b1dd8f623ccb415b8a74cf84894bc619/85210081326.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a61f324cc79---97251639050.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad24f9d3279---28250911679.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607395bc5f10d---pitojaraduwi.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/tikegarun.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a8a5d666e---buwamonipobimerirus.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f1f893c8---81729704211.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607428bd8c333---680912718.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a6dc14b517f0eea9cce2282f677d2182/70154231572.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16114d16a55a2c---36724887235.pdfIn PDF document text
    • https://hgb.se/filer/file/46177426541.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/12250980393.pdfIn PDF document text
    • http://firegallery.ru/img/upload/57264834588.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090d294bf914---muvozoz.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b08a9244c26---gitev.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e566bed4---rukuniputetufofunej.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/69043228143.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/zasokufikanojegamu.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/bopejetosemaletovasubin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=tiktok+hacker+apk+downloadPDF 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_off0000e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 10584 bytes
SHA-256: 4cbe02a5a0e6e0878e47392f1a92d98abd8fc17268768adb8b014067fa58b16c
font_02_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 17032 bytes
SHA-256: bde285ecd5c5ba1fe16e0d97b2616dd9a5366f441048ed7b92465e74d6ef322f

Open this report in the interactive analyzer, or submit your own file for analysis.