Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b398c705e8000c6…

MALICIOUS

PDF

82.8 KB Created: 2021-09-20 15:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3e549541f688d22d3efa2676280644eb SHA-1: 23bb940ff092021413e1076fda9d71bc3fa61aa4 SHA-256: 0b398c705e8000c6d9022cd9686f93a2f4575268ccc35ec0079eada446618397
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or distributing further malware. The PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=muscles+involved+in+shoulder+extension PDF link annotation
    • http://sydjpg.com/images/upload/file/20210911_212516_195.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614808983ddcb---jazix.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/pibiba.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/fenuziwerivuf.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/vasenebejab.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/judobawadojuzar.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/75344880705.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/55017770057.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/20737205515.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/vutofumudu.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/43145100552.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/76224742904.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/11821230661.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/61869743909.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/goforelo.pdfIn PDF document text
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/kujabaxemasikivivozin.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/gavevi.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/18991852280.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/6436843919.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/89670543851.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/zokizanixepifobasuzaz.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/gutimosedewokasumobima.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/74652556083.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/67925705093.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/gopixagixozurobowaso.pdfIn PDF document text
    • 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_off0000e02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02F 10564 bytes
SHA-256: 7c4e1b149f847307c682c34bc2084c3b636a83a2863ee5b932120065de0573db
font_01_sfnt_off0000f83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83F 17296 bytes
SHA-256: 3fbc048e2c3346e63a129f86b675bb6df3956d69fe54cefb7c6a7aaf4472824a
font_02_sfnt_off000124dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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