Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a064ebe8062091…

MALICIOUS

PDF

82.9 KB Created: 2021-09-04 05:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7456b7c85f19fd78eb57f6d05d3ac2b6 SHA-1: 093d997768a40aa5971ef94802535e36a837702d SHA-256: 12a064ebe8062091977f9b5a14721d42f44e364f85d1e6fcda23529d37ddf64c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to redirect users to malicious websites. Multiple heuristics indicate the PDF acts as a link farm, pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://ketchas.ru/uplcv?utm_term=arihant+ncert+exemplar+class+10+science+pdf PDF link annotation
    • https://csp-pub.com/stockages/files/zoxujikamozavarekisod.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8641882d34---mifinamovufowu.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/4144585261.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a36730a66cd---21564612794.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/pexarinutej.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a754f5bfbc3---wajilevefanejoxamofuzu.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/44355056481.pdfIn PDF document text
    • http://neenah1976.com/clients/17995/File/72212766870.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/63082877274.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc5f24b72c---siledoxoxitixavu.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///63063391.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56a21a9950---74657419032.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a724f99653---51442625412.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/44413326807.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/tufatipebabanoji.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/90464086021.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/doleloz.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/qofvqukongstu61ohf5afdm840/jokuduruzasalipevumovolas.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/tifib.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16082ccd47dcf9---42365207909.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9dae837225---mixapolivuk.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b212817a10a---85383285732.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/10ae92f2045639cd4b9788b6e88db914/nemonimapoposamavawezun.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_off0000d6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 21032 bytes
SHA-256: 582dda403ffe31c59014993411b58ade696dfaa11e9369594822eed6214fdb41
font_02_sfnt_off00012460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12460 11024 bytes
SHA-256: fb79a22a0d679dba782b652c9bb3df0e7325f18b26ba1d833551750233cd02ee

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