Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dca11668d9ed373…

MALICIOUS

PDF

68.9 KB Created: 2021-06-24 08:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 30e94088ae696d2da8ffb9978f6b0145 SHA-1: b825fcdfc5d6f3ddc1a78efae14d58dc7297640b SHA-256: 7dca11668d9ed373642ed0bd0fda34363fa6a4a8e869a03ec821df75811db416
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external URLs, many of which point to compromised WordPress sites, suggesting it is designed to redirect users to malicious content or download further payloads. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a pattern of using disposable or compromised hosting for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://gfow.om/wp-content/plugins/super-forms/uploads/php/files/pl46v24gb7n463sr37ol47vl0o/4878838715.pdf In PDF document text
    • http://akicgiyim.com/userfiles/file/pewaji.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/4925c9bcdebd0384f0cdc8c9d86ab039/4852598179.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160847e945337a---xixowinavuxeligufadir.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcad228b3b---mezukuw.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/46461104766.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/lkdsss0o27jaljqbdok6o24rd6/bokigizaxodilajag.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/58533079475.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4afae7702a---77586318373.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/f4d0babc9eefe26c0ab2c748d1d0abe8/lajisiviwapupibepiwasu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/npmuonuua6gfca38vo0h5eqc45/finisetuzixoji.pdfIn PDF document text
    • https://aspirans.com/files/file/99123717868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=abrsm+grade+3+scales+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://scripts.sil.org/OFLIn 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_off0000abcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABCC 4164 bytes
SHA-256: 13721dcdcc3c8da2410990a670c763537ffb685c45dc34971e55cf8de771ce19
font_01_sfnt_off0000ba81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA81 5768 bytes
SHA-256: c47a408eec4db3eb5f697af4f194264468a8ff546be7f62d2d2582dd079337d3
font_02_sfnt_off0000ce0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0D 10280 bytes
SHA-256: 81adff8fd952e3be4df696d16c534e10ab19b7593759e4583e44395e5973bbc4
font_03_sfnt_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 16120 bytes
SHA-256: 2cfc97915d250804213c9b0e6ad261e0979cd38371fb36ec9174dea58a153a3e

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