Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60fe7e71500cb41…

MALICIOUS

PDF

73.6 KB Created: 2021-07-07 09:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b1dda90a48c406a33088303ceae416d2 SHA-1: d787876fefba1cc7074d2d841094f93eea36b975 SHA-256: f60fe7e71500cb41980ff287c51350d2d75fca9d3f43c12f1ef6dab2135a93c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.companyforte.com/imagenes/editor/file/82617992668.pdf In PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac24d7d895f---80294494853.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b21aef9b28f---55959732281.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/81515402723.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/7340690113.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/mibemajiper.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/43b3cad094a5f3ce54b7e6cf1537cc9d/20377516118.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ae8a481d712---wabojadegi.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/kinabapuvafevomok.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608650fcf3f1d---1051162876.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2e360c2ac---82568233330.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/pobodu.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d22bbf07e41a689717b3326217268983/nenegusovef.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78555868192.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/44654263780.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/40641140765.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/91410055038.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2859fd1d44---53774223452.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a679c021273---bosuzamowe.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wotamujowezib.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/ea06b9eb184b13f45d5161125d002565/99864075416.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/71496996536.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/334a6ed6cc68e939fe0011d053095385/bokuzexi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a72c719370d---93003948237.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/a9uuu9j5m5ue1r9ttcgk52ve75/19178127784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=introduction+to+information+systems+16th+edition+pdfPDF 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_off0000bad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 11224 bytes
SHA-256: 328dfbc419d284f49b5599d3283979d8cf83c2ea792eb291c7554e070e99622d
font_02_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 16664 bytes
SHA-256: a6b0652b9a1a9d40b790d2e601222649173ad519844abe45a1b97fd76516f15a