Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4de1b6d38d46b1…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 07:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ee7eb87875a2d799a671ecc1b3d4a565 SHA-1: 7a45cdfaf6b09e6604eb0ae85d41c4ea96752b97 SHA-256: 1d4de1b6d38d46b199fd47152413c68863d59ddc65bd688dd0d2de11b6262687
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories, suggesting it functions as a link farm for phishing or SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab22d80204---jexupitiweg.pdf In PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/59617af32f79a85e1c1d8fb699a8aaf0/97999945229.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/2ddb5c705f2c9ddac904f304da9fe58d/gigubivaxuxojefatadabub.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5b41d2360c57d2540602c8372af0ecde/14351565068.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c1cc8aacc---tikomidarere.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b635de1ad---kimanuvedegiruri.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d4d531ebf35a651fa3b449fb57d3b1fe/17543000964.pdfIn PDF document text
    • http://axwelindia.com/uploads/4576306500.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/0f4c13d2648e1f34b3a6962076b7f3ac/65687376576.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607acaf648a0e---28298460630.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/57559141864.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/vudufazipirikozud.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/e7927deb7c3d2b90f5382ef5b8625771/99035532353.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/74204592958.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/zipub.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b470bf316eb---kibetizi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0163214b62844d87ff4156e02d06bbab/77674288917.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/eefa021420462585a4d92d39525ce29e/wefesejaruwedadid.pdfIn PDF document text
    • http://tipiland.net/upload/file/27299921179.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c4d2a4f78ac89e11f9033a80ffd3682a/bakafaxesapogo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+make+whipped+cream+from+powdered+milkPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 10784 bytes
SHA-256: 6e493db347498aae91c9c150ced879c8298583e7b5c0ee147648c0f3d454fb51
font_01_sfnt_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 17132 bytes
SHA-256: d0a5da5a1eecfbba365097e3cea1388942539279595217081f33eaa472af7ae0
font_02_sfnt_off00012ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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