Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8b50d1098a61d1…

MALICIOUS

PDF

76.8 KB Created: 2021-03-15 05:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d7fc08fd30b0535ffa847b68e814c245 SHA-1: dd3bea84fbc617b392b6c7851b72415319e22f89 SHA-256: 4d8b50d1098a61d1d379ebdf16c771a5c82cc71b1b010194e9582b2a541db320
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary suspicious URL identified is https://soxebez.ru/strik, which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=betrayal+at+house+on+the+hill+legacy+helm PDF link annotation
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/08fdc58574db681.pdfIn PDF document text
    • https://mufejuraziga.weebly.com/uploads/1/3/0/8/130814984/7b05f30a824e6d9.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/ledifixapu.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/1403035.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/lebomadow-tevagal.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxaletadi/DiiCr4g/paripujejegomavadotekene.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/8prjijb/tobofezuriwepojisakanesij.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/nokirevodusofiganizovuf.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/how_to_erase_iphone_4s_without_apple_id.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/BsY9Uhj/gravitational_force_worksheet_grade_5.pdfIn PDF document text
    • https://guvufusefek.weebly.com/uploads/1/3/1/0/131070011/183b0ec.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/op2MLjb/sudoku_247_daily_challenge.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/why_do_radioactive_elements_undergo_nuclear_decay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_c3157c87c5594ba3bb5fb9d4d51dc360.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_01d065fb0da24ea58879d16aeede660b.pdf?index=trueIn PDF document text
    • http://nifuxezelepet.epizy.com/vulivezub.pdfIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_5c96b2860a0641db9df423801746745d.pdf?index=trueIn PDF document text
    • http://vakifavu.onlinewebshop.net/abscess_liver.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_dfc324b903334f1fb559e37404b0fed2.pdf?index=trueIn PDF document text
    • http://danokob.epizy.com/panasonic_convection_microwave_user_manual.pdfIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_1a80d9be1c40404fabaea9959a2120c0.pdf?index=trueIn 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_off0000eb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB75 5364 bytes
SHA-256: f94010335ab83c6772042082da75e400833270824a21a937af2adef3ea60f151
font_01_sfnt_off0000fd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8F 11744 bytes
SHA-256: b54dc37a3d09b824170e1bf1bf5e63627b76da3d0a5e1ca6525bedbd40198798