Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e96bef21cd2a881…

MALICIOUS

PDF

81.5 KB Created: 2021-02-10 18:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c218e91f612120711162ec473e50266d SHA-1: 57839baa68b4539b50e78d75812731e3f0e40cc8 SHA-256: 2e96bef21cd2a88167c7702fdc59e3a9be441b2ddb9393bc32780923cadfa056
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to 'baarspo.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links on disposable domains, a common tactic for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wb?keyword=yi%20guide%208.%2012 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fc5cd0c75024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_601d23ad195b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407998/normal_6019d50d6c5ad.pdfIn PDF document text
    • http://zosujobitusup.iblogger.org/camera_raw_plugin_cs6_7._3.pdfIn PDF document text
    • http://fenofaxizuva.22web.org/arabic_fonts_photoshop_cs5_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413125/normal_5fcd4447ae13b.pdfIn PDF document text
    • http://xutuvulamarav.iblogger.org/xanezimobum.pdfIn PDF document text
    • http://picsonair.com/emotionally_healthy_spirituality_bookq4cmi.pdfIn PDF document text
    • http://mesretly.xyz/lasuwuiqpfx.pdfIn PDF document text
    • http://gagezejiwakale.iblogger.org/bony_mwaitege_utanitambuaje_audio.pdfIn PDF document text
    • http://redit.fun/aoa_full_form_in_societykxd70.pdfIn PDF document text
    • https://sowupetu.weebly.com/uploads/1/3/0/7/130739285/3508034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kobomuxowujuvap.epizy.com/ce_conformity_requirements.pdfIn PDF document text
    • http://xikapewegoruzom.epizy.com/78136502887.pdfIn PDF document text
    • http://lanuvurunipa.epizy.com/vosumaxotaxefomikife.pdfIn PDF document text
    • http://pugagewuda.rf.gd/gupevab.pdfIn PDF document text
    • http://zakusomob.rf.gd/computational_complexity_analysis.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
    • 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_off0000ec2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 4848 bytes
SHA-256: eadfac2c78997f362cd12c178a61215442e0574398e13f348de1ff7559a6c210
font_01_sfnt_off0000fcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD1 11204 bytes
SHA-256: e32aeb1251b24d0aa7896943366959601c5dac421fdb73cc086b8009e3a8d3c2
font_02_sfnt_off00012336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12336 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06

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