Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0d32a20aa9c9e2…

MALICIOUS

PDF

98.6 KB Created: 2021-07-23 03:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 54d4e8ba7a535067292ff7ca72b36fb6 SHA-1: 8ce10b707b1c470bb558b3623787a5c67d9a2e4a SHA-256: ce0d32a20aa9c9e2de49cd7adac1482fcf84ba5497293483e4cbf593a31f00da
96 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm. The ML classifier strongly indicates maliciousness. The document body is heavily obfuscated, preventing a clear understanding of its intended lure, but the presence of link farms suggests an attempt to manipulate search engine results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/54064c3adf58258450289dcc229901ef/46781560248.pdf In PDF document text
    • http://clarksville.net/wysiwygfiles/file/73812025334.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/vamodimen.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/80406298391.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/8444367766.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/2de603e219721275b3898a84a1b5e304/bedimege.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1075f31c2e---51192546335.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/c3946f2d18ec0be5995d128a21edc789/wuvod.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/upuupktm6d1idb7dol8ja9ptnb/98216028639.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/44779873400.pdfIn PDF document text
    • http://mahnomenalumni.com/clients/879209/File/85817825865.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1f2a06550---4469634718.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/l3488bt78pa9inlur41cdgpe9n/59544927956.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-6-19/20210619102428754064.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/sumakawulavotanin.pdfIn PDF document text
    • http://proxima-design.cz/files/file/95648265190.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/tivapafuvefasamejelona.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/wevir.pdfIn PDF document text
    • http://hotelstrack.com/bot/ckfinder/uf/files/rusimolebifozerukutox.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/safasojowuzoxadotikoweze.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/bereminuvevijobavawuxefov.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3fb2bc943---kadonigiruzegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+name+of+the+tiger+in+jungle+bookPDF 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_off0000fd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11556 20560 bytes
SHA-256: 338fa9df4c4337e39b0102417c90cc74c389760a94ab9a272ab3e8037ccd2448
font_02_sfnt_off00014836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14836 17296 bytes
SHA-256: 5a8f84f5bc72843c4bc332cef6a8d32de9b61cceecc841a518f182f84b06876e
font_03_sfnt_off000161ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161EF 11116 bytes
SHA-256: f99f2ea9eeb012b1c4e86d4174199640ba09fe458db371a526ebf6270d6d198d

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