Malicious PDF — malware analysis report

Static analysis result for SHA-256 4086068f3b21e8a0…

MALICIOUS

PDF

89.5 KB Created: 2021-09-16 10:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1aef212baa3cccd00b995fee8466067f SHA-1: 447c5b0a5ed571a4a07926bf8bd282d0ce2fbb4a SHA-256: 4086068f3b21e8a0fe2665cc5dfd6512c2df5cf12b23a6af2bc5845ed120329c
126 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to external PDF files hosted on a variety of domains, many of which are unknown or suspicious. This structure is characteristic of a link farm designed to lead users to potentially harmful content, such as phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://gencatakan.com/upload/file/33735181079.pdf In PDF document text
    • https://sanghvicranes.com/staging/media/7953477594.pdfIn PDF document text
    • http://naso10.com/userData/board/file/jigotiwe.pdfIn PDF document text
    • http://synphabase.ch/upload/file/pijasijumofaxuj.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/negatibubunokuvufexovusi.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/44097732981.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/naxuwopivinowa.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/jetiwusogibe.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021091610243881.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6f79ea7d4---77906396461.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/26919330690.pdfIn PDF document text
    • http://pactolous.hu/upload/file/93193346102.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ogerexeluradir.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/tuzagexixuvese.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/76559866763.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/muginavixekifonojefa.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ded3392174---95928464506.pdfIn PDF document text
    • https://salonrewards.ca/images/file/tulidobebenozesovojo.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/bemiranirubefozuwivo.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/53998326035.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/655734710.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/92248778975.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=static+tripod+grasp+agePDF 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_off0000f780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF780 18876 bytes
SHA-256: 15021789345957093d1aaaf425b44a1212f7c3016de22229358f33908f271122
font_01_sfnt_off00012839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14050 10616 bytes
SHA-256: 2fdf91d169ccb14db128b9540c86eb4dc48f5841cd7abc8dab7b4ef4e5eeaa8c

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