Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7dd5ad3fe5962f3…

MALICIOUS

PDF

85.3 KB Created: 2021-07-03 21:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 11d15b6d180d6ae324fdf356913c3638 SHA-1: 159d4cfb17593060e9e40c5f6fef6f6a53a3d4f3 SHA-256: b7dd5ad3fe5962f3acdc607f424d4c4174d8b0af4c658a554ebe35b499d1bbde
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of threat. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/409d13e5c721503ddb640698f5f4ee20/89127526439.pdf In PDF document text
    • https://annekienlen.fr/imagesfile/sezutitom.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///12632553605.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774adcc8243---78435187281.pdfIn PDF document text
    • http://tonystelly.com/clients/873487/File/ripopirujujodaforuja.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb6a8a61e6---jiforamogalixixibibalil.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/rupeluzagogivosurapusub.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/ac96fde69ec5a71a1a6edf9d6dd7634a/62327038411.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/q3s49tvtrv39rr92u0j1n6c0fe/89605643654.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/mitug.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095c54fb4dca---mobezukevimigugolaxef.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0aba703cd552b0891377b7b1778085ba/xenijur.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adc93a28ed0---bokirutuzamim.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/80244416088.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/bixusakedajikuxeg.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be56db4ea7f---38422229016.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ba2d04ddf4fe402777debf5608656414/rewuzizu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abd4f82393a---fonipufobonerelununiwaxi.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0389d7144a---bogelevagumafewukoz.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/ed08f96b5b6e08faeb1d2bf479a41602/13988815976.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/23cbb6dd20856d0391ad96586ad5a566/xifebugomez.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba0c8dbfa1---lupiramoragefov.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/minoxafafafitojejoku.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f8992d77b---bebigadakuloviviwetisuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+miseducation+of+cameron+post+full+movie+123moviesPDF 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_off0000e2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EF 19864 bytes
SHA-256: 1ee66c3d48e63cd0ea7d2214bed054ac5c49c08e926e3b719ea8f4459a1bcc50
font_01_sfnt_off000114c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD7 11356 bytes
SHA-256: df9a5103af6c990b4f4ebda39421d890f710afd07a531e3c65da1eb088c11023