Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f915a1392aded2…

MALICIOUS

PDF

81.3 KB Created: 2021-09-13 10:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 18580c6cb00eadd7f65eb8ee95ddcc48 SHA-1: 1aea7bfcd740e5b6321a7c96e9fc814937dbfa70 SHA-256: 07f915a1392aded278bda370ddb8f77075534e46bbc0b1a3889b0a3ab9a752c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to compromised CMS uploads and disposable hosting. The embedded URLs suggest an attempt to redirect users to external, potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://securitydm.com/slicice/file/gagowajupaji.pdf In PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/bubevakibasareraxudir.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/86173505549.pdfIn PDF document text
    • http://getdol.com/page_data/file/1362430833.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135505eb3b25---76382378355.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/10869547053.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/87574059969.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cada9f1c6---zilokefukagebilare.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/fubasosijim.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/zezosovatelilatazu.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/67157408926.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/musosazosibanofaletige.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/31648084343.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/869663322.pdfIn PDF document text
    • http://besteva.com/upload/files/15968235259.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/99145391589.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/naxefire.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/c96e84d00088dcd832e5ed285c62a234/14441229821.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/46546362304.pdfIn PDF document text
    • http://shopabrang.com/images/files/31162411143.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/gofedoku.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/72548210689.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/kulevekek.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/63521830598.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/55912988764.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/29865620359.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=jio+tune+old+version+apkPDF 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_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 17548 bytes
SHA-256: 1a922bc749b5f6ead2333071b8f55740bf1d5010fd510cc48fc248e2b61d138e
font_02_sfnt_off00011ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 10632 bytes
SHA-256: 04b0eb40ea88182dcb29ffcad0e4345437eb9edf01e8d4bd79cef62a2f5aa496

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