Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fbfef071f9818f…

MALICIOUS

PDF

98.0 KB Created: 2021-07-17 11:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d9392e1ed365fe5ccab9245ba2b0d282 SHA-1: 989fe944552f6fe548095fc7254823682a3b5c63 SHA-256: 67fbfef071f9818f047fdc7d982815e1eeb8a1b06d7c89821b0ee4beef87b103
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious. A critical heuristic indicates a 'Clipboard command execution lure', suggesting the document instructs users to copy and paste commands into a shell. This is a common technique for executing secondary payloads. The presence of numerous external links, some pointing to compromised CMS uploads, further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/bezofufuzevafosonu.pdf In PDF document text
    • https://cubic.is/userfiles/file/kisazakuwajukus.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/1746636587.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/494b68965eca88c43bcfaa453bf3a6dd/77164938709.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/ramemibigawuve.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/nazelapufum.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/46871381596.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b948550926c0c1a617228532fd9e8c34/48925314301.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/wewudimiroditoselefutij.pdfIn PDF document text
    • http://toonesk.com/upload/vuguxejabineb.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/kamusilimokikezawarive.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/zulozokosigulodow.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/rajuvirawararovapukuz.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4d882c37cd98c6cf4e5f9b8556008a64/muponuxififesupodegokob.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/obvn0n2tdher8eoh2rg2dhh749/84606371599.pdfIn PDF document text
    • http://hkalc.com/userfiles/31946177428.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8f27142fe---49194213127.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/sqkqb2f4m6ve4ei9bdg01i1qnd/kavupapafir.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607e40a146159---ruguwakoxujemon.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/d8e130859fb90a478ae0937cb9d540ba/15159900295.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608028f09053f---70436596448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ipad+connected+to+wifi+but+no+internetPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C1 17504 bytes
SHA-256: ceeff1b51623b5968c18945088001de4ad5906dcee9fa256aade867401e53839
font_01_sfnt_off000131ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AC 10676 bytes
SHA-256: 4254881777d35cd290f7db8678a9133027d036cad17ec154107d29ed5ea7835d
font_02_sfnt_off00014a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16224 16424 bytes
SHA-256: 4eb39ae64381c7fe19edff5f827a5f69db2a60491a951843f3ba809ceb7de06b

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