Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc5cd02aecd46e8…

MALICIOUS

PDF

72.3 KB Created: 2021-10-03 22:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 645551bb537809f23356f9463f178723 SHA-1: fe3519194034cab11a7045f32ffdd1d46b581cc8 SHA-256: 8cc5cd02aecd46e8775129344b5603f7615d334b9f1276dcefd177e03566e033
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs pointing to disposable hosting, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=evicting+a+subtenant PDF link annotation
    • https://qualitygums.com/userfiles/file/beliwixegepowev.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/71635131633.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/43636182194.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/91257551267.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/68819600485.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/kekimotumazerepinimisa.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/78487257105.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/9493415323.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/kixenaxixeginirutowe.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/rogibegonuxezixovuzenitov.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/natubulopalawusuxolalesal.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/60475456110.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/pumugo.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/zamuxevolipafi.pdfIn PDF document text
    • http://xycrusher.com/d/files/53504916185.pdfIn PDF document text
    • http://hobbes-group.com/upload/files/giziwedekevivogidof.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/8360265520.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/sasopikinara.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/kawumulevonajadonefupu.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/torutuvibuxawo.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/50051865961327b27ef444.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/072e10c1508e7e01492b97a13f298780/lokomuduf.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/niroxupazuzofojorubibejig.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_off0000b769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7B 17444 bytes
SHA-256: 2db100e1a8cd8bdbab7cd6452270e2f503618d0493c1eb6509ce78794f357dd4
font_02_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 10428 bytes
SHA-256: 0ae40949f33aecac775468bb5dfc686d6e0ff3396c6a2947898eb1bb1382ac78