Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c80ead4272b2623…

MALICIOUS

PDF

87.0 KB Created: 2021-07-24 13:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2c99096a07b530b8382fab24afd9a5a8 SHA-1: e088a12d856d37daf8fa5d0afd488f9aa27afc80 SHA-256: 7c80ead4272b262346adaf86ff93ebb73ab62a52f1dc77134ef5c6665fea16f9
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised CMS upload storage and a deceptive download button lure. The presence of multiple external URIs and a link farm suggests an attempt to redirect the user to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/aac9d02fa7de026072f0ecc92450452b/18970689944.pdf In PDF document text
    • http://mgocsm.in/userfiles/file/jivurufi.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/64cc9804c54bee98794dfde7ceef303d/mujuvaligojekerat.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/zoriramikujozajapizopi.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/xosilokat.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/245f4vjiclhhkuo9gmeak9m08s/zunegog.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/zuvak.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b7f9d46f2---33308842077.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/83a9491dfad53263deda5ce88df76c07/bezuwumo.pdfIn PDF document text
    • http://bptramptour.pl/files/file/pepixebubejoxalak.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a093a421e61---ledurinisexawuferujobo.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4cbd7c7b94---mebepuvivejuterarifujud.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/53554747135.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1ae6d44ff---nuzikufaxumujutefaribebe.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608378fbc7ebc---43573890205.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/xomoneratefagukikikodixuz.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/12484034635.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/6csmbfhlh74q296emo2q0sitnc/zesanufopim.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/75855367462e5d1437d7d34e72ec3262/bofuwabivo.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/bafum.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lofulezodiligivixuniredo.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/elggqbee3m88qgtald9dli2b89/nulenogumizegelazojafok.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b69894961bb---98502804369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=blockman+go+cheat+unlimited+gcubesPDF 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_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 11100 bytes
SHA-256: 60411a3dfc7c3b3a6e0ff0d94f18a06a3e57a2a9c4580825778450c75cf74e6b
font_01_sfnt_off00010804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10804 17532 bytes
SHA-256: e96c4b687c88cfba6efac27c48600104c398936548202b928223458043a74dda
font_02_sfnt_off000135c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1