Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc46bd610b7039f…

MALICIOUS

PDF

74.4 KB Created: 2021-09-18 01:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 27a30c93e60a92a49f3b7b718ef4cf00 SHA-1: ad529a853ae23a01a95da1a4700b3745c027f235 SHA-256: cdc46bd610b7039fb4ecd8539f5af1641b4cb48aaedc08123ded46a881d15587
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of multiple unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/36479165381.pdf In PDF document text
    • http://orderbestwings.com/uploads/files/fixazuwerodejika.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/13815667796.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/1dnqsscsvbesbctcm76c2jfbj0/wujajulezesajadu.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/folisokoleniwuwobe.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/52157020205.pdfIn PDF document text
    • http://soc-in.com/data/media/files/pumanizosuzoxukodezabuk.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/zifimipet.pdfIn PDF document text
    • http://rjt1.org/upload/files/wobuloterawuv.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/juvaveveratu.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/88084377881.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/dalasokirivoludefikedaf.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/vutixufozeni.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161320623bc6f1---87431544422.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/42822758785.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/92353820156.pdfIn PDF document text
    • http://foxhill101.com/userimages/89264249653.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/u89rap5ehdpvro8p4jvqv33404/46889034578.pdfIn PDF document text
    • http://short-story.ru/upload/file/28601356649.pdfIn PDF document text
    • http://theponghop.com/upload/files/56387652610.pdfIn PDF document text
    • https://h016s5or78-du3.com/contents/files/88163646266.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/lazitalubosemugep.pdfIn PDF document text
    • http://deauville.ru/files/file/puravojuxapevajadaxav.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/botapewuwopil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=what+channel+are+the+mma+fights+on+tonightPDF 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_off0000be04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE04 10776 bytes
SHA-256: 33de358947af9343a5aa98eb5ecc8342352ba3487a460f80228545d05a51b317
font_01_sfnt_off0000d6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 17264 bytes
SHA-256: 3bf8a3c1be77e1d53d8a072ff5031c2670a80d8cf732988633b9b7cf69217717
font_02_sfnt_off000103ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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