Malicious PDF — malware analysis report

Static analysis result for SHA-256 9601383bfbe3a087…

MALICIOUS

PDF

152.5 KB Created: 2021-08-20 05:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 35de7cf7bab7351a0a72f0b9eecd5fef SHA-1: afc82d3cf2ff4999a5d7350f2b3541e1453b39d1 SHA-256: 9601383bfbe3a087de5081e568a74415484ec110f9d0949fb7918588f99f2f4b
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links point towards it being a lure to download further malicious content.

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 https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/1dhi9uu7uh51fc54fh8jgbr8j3/203129804.pdf In PDF document text
    • http://hbleg.com/admin/userfiles/files/51716260190.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f6e8d4bd5eb---xiwovosidizevuxidozalesoj.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/zetalutaripiruwularire.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb12a98c02---2870017707.pdfIn PDF document text
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/85015546401.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/redefitemir.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/91477505422.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/41946897686.pdfIn PDF document text
    • https://samowar.me/userfiles/files/meseliximuta.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/medimogeduxikexoxatika.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/rkq6m8vrc4eht21e2bc2cgh94j/zoparigowazezepadakak.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210708122556.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160851bb42e0ad---97708736837.pdfIn PDF document text
    • http://biafrapol.pl/pliki/file/35165184323.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/137c16ac8600874d6b80c4a9bbc35bc4/1816602198.pdfIn PDF document text
    • https://maintogelonline2.com/contents//files/18030841949.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab651b5252b69590ab30e3d8fe76a248/kosedejavik.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/94338298053.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160987badad3e4---subefiku.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/24471379950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=midas+m32r+manual+fran%C3%A7aisPDF 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_off0001f14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F14B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002095d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2095D 18296 bytes
SHA-256: bac2d4b3d48c533710856c36c7062bb4b857f589d599b8b7d7d2b54bf1c4152c
font_02_sfnt_off0002395a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2395A 10748 bytes
SHA-256: 8d0d42d7991166f5fa84c9da29215b91f512566354bde8af9314fbd95f4f135d

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