Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7e4ea17969a02c…

MALICIOUS

PDF

76.8 KB Created: 2021-09-16 18:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ab60632d8c97928be5c2e2ce40248b77 SHA-1: aa359bff102bb9a9b3d905e1f046fa34e53a22fa SHA-256: 7b7e4ea17969a02c5bec3a01506d83657ed6a724594963839ef5f9a36a289b7e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, including a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to further malicious content or downloads. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medianet2000.net/amm_prod/image_news_popup/file/kikefomerefirafexaralewol.pdf In PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b8d3d44ed---97531283382.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/bajibimowimebelubaxaxeze.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/najutovezezamixupawaw.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/fusirunutenuzulofumusu.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16130847725364---xabarezefeniludob.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/zavezubefenejileva.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613986da92123---87352692885.pdfIn PDF document text
    • https://digireg.ru/upload/2617461076.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/16715180613.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/leboxiwonodetafuritobab.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/91991964587.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/xenef.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/l02a2a1mc7a80tv1ec2pl0lmsj/63639933246.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/lumibimanujadonofaku.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/5145710972.pdfIn PDF document text
    • http://agro-norwa.pl/userfiles/file/71081756542.pdfIn PDF document text
    • http://mobitransjogja.com/files/jomubipidetevaxisesovedi.pdfIn PDF document text
    • http://ashioke.com/images/library/File/74216868997.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/bateg.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1631567405zuzepamapuliz.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d113450611---kefutixafedojotetobujoso.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/pizebifezezeruxuti.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/79288825305.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=malela+jiv+book+pdf+free+downloadPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/49200135514.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_off0000ca0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0F 10732 bytes
SHA-256: 787a66b8b7906ec20f0b3e145aaeacd858469b056aec8de5fc8777b23e48e780
font_01_sfnt_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 16696 bytes
SHA-256: f38149bb37504cf0dfb5d1287ad8db3d0b87037dd73cc0fd1d811b4697980e7d
font_02_sfnt_off00010d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1