Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78019bfd2b26879…

MALICIOUS

PDF

89.0 KB Created: 2021-09-05 04:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: a99c3118e47461657c2b09ba7be826c1 SHA-1: 9b29d046ad0d12290a8796099b5f90f711af1a79 SHA-256: d78019bfd2b26879800766796c8e4eb5ea4b15083a2842818fbf586a52cbdfe3
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document impersonates a cloud document lure, directing the user to click on embedded links that point to compromised WordPress sites. These links likely serve as a gateway to download a second-stage payload. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially compromised domains supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8ec689460---68718855162.pdf In PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/feb4d63daa94bdb257088ca07ae56ac7/wakelavirusigokamisibuno.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081919e5e1dc---wedikedigujulikoxuwo.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/4548957916.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/d88f327bfe1b3aa47299b385f4f6164e/47233251155.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/fijeladeretuwisifimeberim.pdfIn PDF document text
    • https://manenshop.com/upload/files/45615669794.pdfIn PDF document text
    • https://www.speeddating.lt/speeddating/ckfinder/userfiles/files/jiwizetiramiba.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/wetexefosomigazebeja.pdfIn PDF document text
    • http://dyweisheng.com/uploadfile/file/2021081321465273499.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c92a99c2fd---86716172388.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/jiwegelirila.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/fagasisagurolugilivilozu.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f20577eebe---81692614293.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/35559593492.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/7642359533.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/20311814556.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/jasasat.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/zopovobagirus.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/zixumupajomefokod.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/sowopukavubiri.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/45e66304b25732be77b3e10c8097211c/katiki.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/luwojasitajubojodagiweb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=pdf+editor+windows+7+32+bitPDF 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_off0000f746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 17948 bytes
SHA-256: aac2fe125ce3478bdb839590d38d9ee0bb98e1bd8ce93408418a5978d69be679
font_01_sfnt_off00012541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12541 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D58 10708 bytes
SHA-256: 5772528da7a02ce3fa1f65d0f445fe545d7eff3e6146d33dc0cdf82b71a4e139

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