Malicious PDF — malware analysis report

Static analysis result for SHA-256 a280892884e6a013…

MALICIOUS

PDF

88.9 KB Created: 2021-08-14 21:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4eabf9ef762f5b6234f7589b1fdb1cf9 SHA-1: 8fb28299a2c295013f5cfe09df89379be112c1a0 SHA-256: a280892884e6a013eaaef29a63b14f09d1efc519e4f4210fc5567b03e56b73fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute further malicious content. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://cuacuonbentre.com/upload/files/luvijezipara.pdf In PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/bc7824b2559ea301e016397b5280a495/nozojux.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/watijezax.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16093e4c5d3e37---dabame.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c00f4e34792---53659852970.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d04a4f9a2---40332706344.pdfIn PDF document text
    • http://erfansari.ir/ckeditor/files/files/17706350335.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/xewobi.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210807_538FBFDDBECFFDE2.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/357187548.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/kewosikaze.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e27df8860c938976647f6bd292395e36/36092254284.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/4ot7uojta8fnki730oidb7vo36/nesedoruluposodavi.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/wubupanakupugorowedajavi.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/de15e748eca0e9608934ceba520e99fc/mavigos.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083ad2083625---88898873922.pdfIn PDF document text
    • http://rubensova16.cz/files/file/gilatoxojumabisuri.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/211628284532.pdfIn PDF document text
    • http://chapelguild.com/images/usr/8075447322.pdfIn PDF document text
    • http://slsnn.ru/content/file/89902704040.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/jpq03900j2ar34cgrjtj68dlbu/vilimivewesenib.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070c182c60dd---97552148456.pdfIn PDF document text
    • https://magerp.org/upload/files/tulixobexamibivek.pdfIn PDF document text
    • http://yanartekstil.com/firma/files/70662553856.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e614e77fcb9---5158734428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=transformers+age+of+extinction+movie+download+in+hindi+720pPDF 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_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 17456 bytes
SHA-256: 1f5a3fd71c66ab1ea9dd29a1a2c28236725d2f29b7b562d31d4521b2a812f2e0
font_01_sfnt_off00011e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8C 11576 bytes
SHA-256: 97669de24601031f1b886e3e4780f741ce8ea8a233008e24ec8bf1394cbe3789
font_02_sfnt_off000139d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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