Malicious PDF — malware analysis report

Static analysis result for SHA-256 9517bc020003ecc2…

MALICIOUS

PDF

69.0 KB Created: 2021-09-03 10:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f5d6f72c648e40729599feb98cab894b SHA-1: b28e2f363b7b5e1173e079b8fa3a24829788439b SHA-256: 9517bc020003ecc295e385e334e117c73c8bc99a79918242b09892f5cfa4ea5c
176 Risk Score

Malware Insights

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

This PDF document is identified as a phishing lure due to its image-heavy nature and embedded links. The heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/xabiwuvi.pdf In PDF document text
    • http://adimhukuk.com/resimler/files/gojagim.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/tj7tvvf8n4fffcnh15q6ed7nch/30015770136.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/fonopibuniwodusuxu.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/34619020968.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/96482765455.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1343029e44---mitaxe.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/32789828024.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf8f964fb---bovor.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc13421c13b---rozoxakumarawigakozir.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/ta87091ggu8mcqgqoadvfsm5f6/26368356843.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd2cb53d19---11915397968.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160950898452d7---gevemodenu.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210819021831169.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fe8e408c7---gawaxapudakasibuson.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/fomanuxub.pdfIn PDF document text
    • http://huiking.cn/uploads/file/05190732631.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/43426167306.pdfIn PDF document text
    • http://classtool.info/upload/files/12465074934.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/nodofedilosetelozo.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/sasupevujasarusotefi.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/voniludabubuf.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f8dae85cd---52114956896.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609efeebe7d64---gozared.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=sounds+of+different+animals+pdfPDF 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_off0000b2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E3 14112 bytes
SHA-256: 4b4644a4302e1ac687b02e6eb9a08102554a30b7c6186d648209d70b1d9f1b08
font_01_sfnt_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 10832 bytes
SHA-256: 1f57ae9936067a8156afea1b01db5bbd8d57e0792e41f70c05eafa04451b97e2
font_02_sfnt_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1