Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd51098295015600…

MALICIOUS

PDF

80.5 KB Created: 2021-09-05 14:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b79a97ed45d357aca564cb27d330e52 SHA-1: 5f3d9dae9302781e01ea133c787eb4927961f520 SHA-256: dd51098295015600bfb39a40242a91b49cadc4777cfa6bfa829d1e9b56a6816c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the heuristic firings confirm the presence of a link farm designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.kymenhome-etsinta.net/tiedostot/files/71028321660.pdf In PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc79a68e5a5---69119605422.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607182a9e1794---42584298358.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/85128844734.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c63fcb98af---91431726781.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/52252806729.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/10053756376.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/2vma3o8rig4af4vft7ulu6sus9/ropug.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/kevinazadim.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/35aa6c1f9ad2f5647ef030bbaea26694/wipivikomixu.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/bomamesotavonekabojuga.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/92298850277.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/37751103086.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/8943436154.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/92821712417.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/gumidepogeperinozut.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/tobuv.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/c220cab0676d0ca33622ca5a2937c440/fazelobajotuninutinebinez.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/dodose.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/jozatazixifawegemisuxebaw.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/8u926g2ne70dpgds5m6vvhot7m/54029627156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=hysteresis+loss+in+transformer+pdfPDF 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_off0000d4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0E 17928 bytes
SHA-256: 4c4019250b41941470f1be2e0cd1dd7fc653b74620d2d62ba0e0ba6595eb1d92
font_02_sfnt_off00011b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B80 10764 bytes
SHA-256: df35ca4f39fce75eb73587da649c653a0a0fe71b31c2947fd27a05e0de7e210f

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