Malicious PDF — malware analysis report

Static analysis result for SHA-256 b448adca140bbb5e…

MALICIOUS

PDF

87.4 KB Created: 2021-09-04 07:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b93e35d09577b46203214670154a5adf SHA-1: 208dc8ee2d081481e8f98a2e0ef82a2addc8dc27 SHA-256: b448adca140bbb5ef75a636ca85d9eb922e5662b14f1a46b6ba246daefa9284d
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. Static analysis reveals it functions as a link farm, with numerous embedded URLs pointing to various websites, many of which appear to be compromised CMS installations. The primary purpose seems to be redirecting users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8a8f42a49e94652e9f85f16559c5bba6/85454859568.pdf In PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b464e0f6eb---wozadetaripur.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eba8f572ea---56265338756.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/wedevisijukedufu.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/a107u2h2l4ikdimtgigv7ckjmo/51167713288.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55205c2bfa---xoladozobarawo.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec55c32d24---56862820351.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/15938876370.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/toxalenojutimaminubew.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/jng225cfifsumj58ggvbiej92h/59691180527.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125d57238a40---65739023052.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/18629045683.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612c2dff40a6d---15220020855.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66267689882.pdfIn PDF document text
    • http://sadrainsurance.com/UploadedFiles/New/file/vogotovoti.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/a50d915ef56ffad888bb0c2eddb8130d/41867860431.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/cbvgfnnceldsshdvm80l6svp81/77651813997.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/1eb98v683fiv4r4ed72a6ja01m/medozevikut.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/97126100522.pdfIn PDF document text
    • https://jagamimpi.com/contents//files/99414154171.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/likadin.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/45457140477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=caucasian+chalk+circle+novel+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_off0000eecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECC 10908 bytes
SHA-256: a89899e26af1978e11ac018ce0f0865f15d2fc3a305b60e954a79dee4bd1ef67
font_01_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 18516 bytes
SHA-256: 9d8889d2640a1be413e6bb7326643ec6131b67f836f639a869c9609d3f7d0a61
font_02_sfnt_off000137c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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