Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ba6cc18461d79b…

MALICIOUS

PDF

83.4 KB Created: 2021-09-18 09:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9f0afd8772fea66219efdb74346e53fd SHA-1: 197a012c0e9992858470facb31052332603b5f8b SHA-256: 38ba6cc18461d79b6130a777389d76e83ed1eb0a55a4373d82a27270661d2e93
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains a large number of external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates a phishing or tracking intent. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://irlanc.ru/uplcv?utm_term=super+status+app PDF link annotation
    • http://print-printonline.com/ckfinder/userfiles/files/mixep.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/batogipi.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/81a7a6e625b580544f71d033ec25f5be/77670342341.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/wunubida.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1a7554d75---mogipudosabejoretamamikar.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/9ef25c6c8e184409803b2c4df6702619/filamadar.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/rexosizokanafomamisakana.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/deregoligizi.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/babotid.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/42570290166.pdfIn PDF document text
    • http://jubangh.com/Upload/FckUpload/20210918file///4681292546.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/0f96d55281efeae4d017b4ee3f3bb184/68036293215.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/guwakuximajagelowiso.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/78300771034.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/lijin.pdfIn PDF document text
    • https://makenie.com/upload/files/xavafilifurazusa.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/saweratoxu.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/ruvisemarogufixu.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/poxosobaneg.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/vizowatilidad.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/nafebosutoza.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/rekekutesolozosojidabo.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614563e75866e---22444332355.pdfIn PDF document text
    • https://bauarch.bg/files/41065175321.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/bifetosapovuvok.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090404503065933.pdfIn PDF document text
    • 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_off0000e1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 18112 bytes
SHA-256: bcccc4adeeba8be9668f644bb32f8714245179512cf5d7577355fedb3d013126
font_02_sfnt_off0001297d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297D 10060 bytes
SHA-256: e7fffae50463dcdd8bf3a64e3482e6cd4ca42e425573d84bcefced5574c388cb

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