Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee91dfc318bced25…

MALICIOUS

PDF

85.7 KB Created: 2021-09-23 05:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 231f784fce5151b02d374c9a135ccfe5 SHA-1: c06b8a07560f7f21540183ce02748c7dd4aa8b52 SHA-256: ee91dfc318bced257d9065e3302be291bfff1b504b60a8406996bccf489f8fad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or redirection scheme. The PDF structure and embedded URIs point towards the use of external websites for malicious purposes, likely to deliver further payloads or phish credentials.

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://chcial.ru/uplcv?utm_term=oet+writing+for+doctors+pdf PDF link annotation
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/saburuvimatode.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16145a4974aa22---bosafebujafadekejeja.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/dipesotot.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/25304014589.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/fadixowexepen.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/buxid.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/balozitekolezobavukajudob.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/81349581696.pdfIn PDF document text
    • https://almuhja.com/ckfinder/userfiles/files/19631812875.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210921204525.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/rarurevimurifonekewanen.pdfIn PDF document text
    • https://groupunsur4.com/contents/files/17816077040.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/vinezorumaxitatur.pdfIn PDF document text
    • http://csigikes.hu/admin/fck_upload/file/55089121254.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/segusutozafumim.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/d49f88a9574bc1d73cf6ca8cb4cb1d78/nudetofamipagubax.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/97770885103.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/robukukugaxojametesomif.pdfIn PDF document text
    • https://pactforfamilies.org/ckfinder/userfiles/files/didikofatosa.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/zepemiti.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/tukozifimeripewan.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/904397880.pdfIn PDF document text
    • http://bodamvientin.com/uploads/userfiles/file/rugafisifamoxofazobifukoj.pdfIn PDF document text
    • https://kawanmto.net/contents/files/wajumutimibobi.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_off0000ebe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 17172 bytes
SHA-256: 7b4e3390ff71c5aef8aa7636cbbead6f088df0b486ea58dbe2db8a3d57a39333
font_01_sfnt_off0001184f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184F 10700 bytes
SHA-256: a2470041d6464d1a2a854cdf08fef17113e48bac44ad475786c6e37491bc7fd9
font_02_sfnt_off000130db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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