Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae6071ab6424290…

MALICIOUS

PDF

81.8 KB Created: 2021-09-15 11:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6debe42fbbf4227e65edc504840431f7 SHA-1: 6dacbb0ba6a32d6124ecf07499bd7022b55ad70d SHA-256: 8ae6071ab6424290c7a6a9b843c9f1fe5187e66ac914d4d4bf39cffad6e470f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection to these malicious URLs, aiming to trick users into downloading further payloads or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://pistant.ru/uplcv?utm_term=how+to+hack+bonetale PDF link annotation
    • http://scuolascifondocortinadolomiti.it/userfiles/files/dafilajap.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/cc2149826f9c6bbfe21f7b56bd47da35/patofazi.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/momuvowofalosupuwagof.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/fahqorqcppe8gr70c1e50jbn24/larex.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/i1o639g3lqflvn4csus6rlgsb4/lifonogavumodifolodaz.pdfIn PDF document text
    • https://predial-rua-nova.pt/056-CovadaLua/images-editor/file/80959223624.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/sibanatuxowoxi.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/zalitedem.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/xegegolamakujasew.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/51472358493.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/39824199470.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/nipufejujeduvid.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/59670844208.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/27645332042.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/bukaxuzivajixelopuxadak.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/funixulutix.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/bosukadik.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/94603114835.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/202198202923464.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5957531a2---dazagarebinefaxuvig.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/28285245897.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/76036855148.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/kikufanololirixezegaxijup.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_off0000de42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE42 10276 bytes
SHA-256: c86abaa937c4e9a4df288a478566c1320285550e4ff36aad8b907d63d0625155
font_01_sfnt_off0000f565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF565 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 17344 bytes
SHA-256: 25202978e42b6f412c6b3722eeb6daddef82851088d5873272767933aad9c2ab

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