Malicious PDF — malware analysis report

Static analysis result for SHA-256 f375749eee6facf6…

MALICIOUS

PDF

85.1 KB Created: 2021-08-16 11:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a3e8ba5b1b302a8adf3ea463b04b7d46 SHA-1: 2908bc1cb4a362ce18b8fa975ec4a60629622ae0 SHA-256: f375749eee6facf69df51cb3eccd015b320dbe299e42fefc64edc41d80480f22
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f505383363---fexipojarizubatez.pdf In PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160940c44ee2d3---68904036475.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/8355401132.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/buvilaresexupizugexuw.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/91804929889.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/d4b8f747bbf3a0600dcccb2e739911ea/86611382489.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3434721c38---26627193615.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/17297322661.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/gofisod.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/b63e783065ceddc62d02d3c01b11458c/poduxifemijiro.pdfIn PDF document text
    • https://termofriz.rs//files/96194483371.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107b1a0e0091---20865829334.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7238001a1f9606d34848425cfa4dd9c2/fozinafup.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/88304619036.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f518104242---sarezijib.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/jupifatibomepuxulaxomi.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/waleselof.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/19705533072.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/givopokegomerepomen.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/64367618969.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/zurebirefuxikotufevepen.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/33880873574.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607319e9b4ca0---43030545844.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/11097855446.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/lujizaxarinemuvasunafewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=what+is+the+best+battery+for+aegis+soloPDF 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_off0000dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 18680 bytes
SHA-256: 26fcba4db7ef70b738df5fca462cbe870f8df0e17831f49aebad65344a00d90f
font_02_sfnt_off000125ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EF 1732 bytes
SHA-256: 5c6c785476e112a6f75a41f06a02e059cdfb235959dec2f331dec4fc21c5e077
font_03_sfnt_off00012e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2C 10636 bytes
SHA-256: 6b4b1cacc37fc1e06b2e57113df73e832904fd0564f06102966a8c30e6185e0d

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