Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c69ff1a82db53e…

MALICIOUS

PDF

82.0 KB Created: 2021-03-01 03:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d0baf3a307c7eb82e0b79071d8151edd SHA-1: d3656f4fbaa700154191a6ac4e734a1a0d32e984 SHA-256: 21c69ff1a82db53e4dd864c60deaf130520ca39b18f14801d85cfa80fb6cc511
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL being used as a lure for a physics textbook search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple disposable hosting domains and UTM parameters suggests a campaign focused on redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=halliday+%2526+resnick+fundamentals+of+physics+10th+edition PDF link annotation
    • http://luxasireku.sportsontheweb.net/honda_riding_lawn_mower_parts_near_me.pdfIn PDF document text
    • http://bitcoins-profits.com/10170748690mil4p.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/xilel-xuwutufisaxe-fovunolatisav-gajerizes.pdfIn PDF document text
    • http://kakerusejom.iblogger.org/46917720011.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/hieroglyphic_alphabet_font.pdfIn PDF document text
    • http://kokofiru.22web.org/genodapedoruxeguzitawete.pdfIn PDF document text
    • http://ionatr.space/63504637264cppbd.pdfIn PDF document text
    • http://pegixudovojap.iblogger.org/55441059315.pdfIn PDF document text
    • http://idealslimitaly.site/one_of_us_is_lying_peacock_tv2qufv.pdfIn PDF document text
    • http://akvatehnika74.ru/saxiviwudogpivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://libafal.epizy.com/fapapufapizedov.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/77820269435.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/mezilerenutef.pdfIn PDF document text
    • http://nizalag.rf.gd/nios_assignment_back_page.pdfIn PDF document text
    • http://buxodanukesidup.epizy.com/kujerosijuzotuboja.pdfIn PDF document text
    • http://pumovumibabir.epizy.com/wuximugifene.pdfIn PDF document text
    • http://vufobaratoja.epizy.com/19020661600.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/84503913392.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10502 4600 bytes
SHA-256: 966818a18e3d66ea8c01c8d1e0c13bc8f1d70444565becacbe1ecac47c8c6084
font_01_sfnt_off000114b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B5 11344 bytes
SHA-256: c713c07c70a8081499f194d8918b96e04dfd4feba9a907d24e5be95ef19532b2

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