Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a72c00df0c9fc91…

MALICIOUS

PDF

92.0 KB Created: 2021-08-18 17:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 53df1ffa56fef6dda0700241c4c5969d SHA-1: 66ff2d99006f3e0c2827bc263085dfc7c7e6c927 SHA-256: 3a72c00df0c9fc91737b048188e137e18a94096d3ecaf5c1aeee5c30e72c102c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/dk1uu1q7alk73e5eb2ij430i8g/dubusefu.pdf In PDF document text
    • http://phuwangnam.com/user_file/file/zizokajinizirokedofuk.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/divap.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084065fecf98---puguxijebiwi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1ca193995---jozalitev.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/rapimetitagegamokegim.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021071909454923.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/34296659004.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ddd92b2d2---60541894362.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c808d804fe---jejawunamoresudo.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160786e15bb11f---ronatonomo.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/0o7e8rl7ifkoi5is71v3p765us/79386143832.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/iinmpd0kjva1di806389ro0bkj/92109284625.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/wibozazekorarikowuwakadu.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/bc39ab80a6a0e8749b27c00d2e1f3f8d/38397304642.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/58480783993.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/45809493123.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/96701039679.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/kubakezitifotafexe.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/n0qr3s6qfrcskeqtq5st70psnq/14517924621.pdfIn PDF document text
    • http://soflacops.com/clients/83266/File/nawebadabizuse.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/togazivedujonujemo.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/43c7dca3899d81f3a300e19e0b15d2d5/62313645593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+much+are+husky+malamute+puppiesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 16520 bytes
SHA-256: 17dab69886bbd3ec2a6b7f0b1d65c3601f0d4afd9e3fe3dca6a26fc3206f9cfe
font_01_sfnt_off0001022e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 17100 bytes
SHA-256: 84c4d33a5abd20db4dece9602e646973028b7085e4d3c694a2eb050a72052d31
font_02_sfnt_off00012e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E99 10916 bytes
SHA-256: d3ca557e4e390517c1c1b1cc42efa1307077572ed07ade25d4e66e47c4b84bd9
font_03_sfnt_off000147fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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