Malicious PDF — malware analysis report

Static analysis result for SHA-256 6826284d6548dd23…

MALICIOUS

PDF

82.2 KB Created: 2021-09-06 07:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ad555359b59c7c00064eced414518b22 SHA-1: a2b812e8fb17dc3057c9013a55c0472ab520895c SHA-256: 6826284d6548dd23b74508e81c34d001d84f8ee3a21c4ddbcf2c73d73b08c128
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to compromised WordPress upload storage, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e89ca61c---38537033512.pdf In PDF document text
    • http://unityproductions.com/upload/files/pipaluzojadimodu.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c2834644018---kadudegefuwufufanu.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/71130800872.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931831dbe9f---merulowonukerarerib.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/woravufegezemukenu.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a3dab24baa366c83ef2aef3896719091/66645321858.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/i7clc8gl3sj53t6gmfi3m97un1/lulisuzaworitoxaluremusi.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/2709286612.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/72e9ad3c85a745bc2be34a31abd7388c/jukagadofosibitiwunagiki.pdfIn PDF document text
    • https://slide-bearing.com/d/files/gisenebutaxuzenil.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/48137238619.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099819224e8b---muloropajuzuwoku.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/7c70cd8329e4ac5b3012eb9b64c5cc19/gisawak.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20217822288610.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b760704f90a---97098123122.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/managero.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b7024980a986ed7dc7a8c0610abba941/xisud.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed1ab407f6---mekuvibutowoluzetaxatove.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752b1a8484c---17651394716.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/bigojarujutabev.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/fokamuvipuzowake.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/27e2463eb205c56923396b83097a36f1/vevomopegovewexadunebi.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/titikininiwobamuvug.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/88971135040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=trigger+point+chart+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_off0000d9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 10648 bytes
SHA-256: 342d4c73596f017a907912818e3b6e4645ca06ee2a232f5f4780f4a65d662b3d
font_02_sfnt_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 18972 bytes
SHA-256: 1a1f4f54f87870aa8839928c853defe99a113021fef9aa1d85b75b900481dbae

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